Discussion:
Use of dynamic system symbols in JCL
(too old to reply)
Sean Gleann
2018-06-06 14:26:49 UTC
Permalink
Raw Message
Can anyone point out what I'm doing wrong here, please?


I'm trying to create a file with a name that features today's date.
My statement is:
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024

When I submit the job to the system, I get:

IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD

I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see the
wood for the trees...


Help... Please...

Sean Gleann

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Rob Schramm
2018-06-06 14:29:39 UTC
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Raw Message
You need 2 dots after symbol.. otherwise nodeis GT 8 characters

Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see the
wood for the trees...
Help... Please...
Sean Gleann
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Rob Schramm

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Sean Gleann
2018-06-06 14:35:14 UTC
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Raw Message
I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error

Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Rob Schramm
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Lucas Rosalen
2018-06-06 14:36:44 UTC
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Hello Sean,

Are you sure you're running on a z/OS version AND class that allows symbols
substitution? Apparently the original &LYYMMDD was no replaced.

Regards,

-------------------------------------------------------------------------------------------------------------------------------
*Lucas Rosalen*
***@gmail.com / ***@ibm.com
http://br.linkedin.com/in/lrosalen
Post by Sean Gleann
I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error
Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Rob Schramm
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Rob Schramm
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Rob Schramm
2018-06-06 14:43:21 UTC
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Raw Message
What you have coded will produce more than 8 characters in the last node.

Have you verified the symbol works?

Maybe use a SET XXXYYYY = &LYYMMDD. ?

Rob
Post by Sean Gleann
I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error
Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Rob Schramm
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Rob Schramm
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Andrew Arentsen
2018-06-06 14:43:40 UTC
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In my JES2PARM, in the definition of the job class that I'd run this job
in, I specify SYSSYM=ALLOW. I'm sure you could put this in dynamically
with a $T of some sort. You'll also need the two periods as Rob stated.

Andrew Arentsen
Senior Mainframe Systems Engineer




From: "Sean Gleann" <***@GMAIL.COM>
To: IBM-***@LISTSERV.UA.EDU
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL
Sent by: "IBM Mainframe Discussion List" <IBM-***@LISTSERV.UA.EDU>



I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error

Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Carmen Vitullo
2018-06-06 14:48:57 UTC
Permalink
Raw Message
Yep, need to make sure SYSSYM=ALLOW for that jobclass,



CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW




in a STC I run at IPL time I do about the same....



//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR
//SYSTSPRT DD DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10
//SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....



Carmen Vitullo

----- Original Message -----

From: "Andrew Arentsen" <***@ACUITY.COM>
To: IBM-***@LISTSERV.UA.EDU
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL

In my JES2PARM, in the definition of the job class that I'd run this job
in, I specify SYSSYM=ALLOW. I'm sure you could put this in dynamically
with a $T of some sort. You'll also need the two periods as Rob stated.

Andrew Arentsen
Senior Mainframe Systems Engineer




From: "Sean Gleann" <***@GMAIL.COM>
To: IBM-***@LISTSERV.UA.EDU
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL
Sent by: "IBM Mainframe Discussion List" <IBM-***@LISTSERV.UA.EDU>



I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error

Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Jousma, David
2018-06-06 15:03:47 UTC
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Is anyone else pushing back on turning on batch system symbol support? We've yet to do so, for the very reasons that IBM hadn’t supported in batch all along. My main concern is unpredictable results.

Am I worrying for nothing?

_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
***@53.com
1830 East Paris, Grand Rapids, MI  49546 MD RSCB2H
p 616.653.8429
f 616.653.2717

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Carmen Vitullo
Sent: Wednesday, June 06, 2018 10:49 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

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Yep, need to make sure SYSSYM=ALLOW for that jobclass,



CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW




in a STC I run at IPL time I do about the same....



//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR
//SYSTSPRT DD DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10 //SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....



Carmen Vitullo

----- Original Message -----

From: "Andrew Arentsen" <***@ACUITY.COM>
To: IBM-***@LISTSERV.UA.EDU
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL

In my JES2PARM, in the definition of the job class that I'd run this job in, I specify SYSSYM=ALLOW. I'm sure you could put this in dynamically with a $T of some sort. You'll also need the two periods as Rob stated.

Andrew Arentsen
Senior Mainframe Systems Engineer




From: "Sean Gleann" <***@GMAIL.COM>
To: IBM-***@LISTSERV.UA.EDU
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL
Sent by: "IBM Mainframe Discussion List" <IBM-***@LISTSERV.UA.EDU>



I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error

Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Rob Schramm
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Ed Jaffe
2018-06-06 15:15:44 UTC
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Post by Jousma, David
Is anyone else pushing back on turning on batch system symbol support? We've yet to do so, for the very reasons that IBM hadn’t supported in batch all along. My main concern is unpredictable results.
Unpredictable results in what way? If your JCL doesn't use the support
then where's the exposure?

Of course, if your JCL does try to use the support and you haven't
enabled it, then you definitely have predictable results -- predictably
bad. LOL
--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/
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Carmen Vitullo
2018-06-06 15:18:01 UTC
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Raw Message
I moved slowly, changing test jobclasses first, found no issue, and went full out with no issues



Carmen Vitullo

----- Original Message -----

From: "David Jousma" <000001a0403c5dc1-dmarc-***@LISTSERV.UA.EDU>
To: IBM-***@LISTSERV.UA.EDU
Sent: Wednesday, June 6, 2018 10:03:36 AM
Subject: Re: Use of dynamic system symbols in JCL

Is anyone else pushing back on turning on batch system symbol support? We've yet to do so, for the very reasons that IBM hadn’t supported in batch all along. My main concern is unpredictable results.

Am I worrying for nothing?

_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
***@53.com
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H
p 616.653.8429
f 616.653.2717

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Carmen Vitullo
Sent: Wednesday, June 06, 2018 10:49 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

**CAUTION EXTERNAL EMAIL**

**DO NOT open attachments or click on links from unknown senders or unexpected emails**

Yep, need to make sure SYSSYM=ALLOW for that jobclass,



CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW




in a STC I run at IPL time I do about the same....



//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR
//SYSTSPRT DD DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10 //SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....



Carmen Vitullo

----- Original Message -----

From: "Andrew Arentsen" <***@ACUITY.COM>
To: IBM-***@LISTSERV.UA.EDU
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL

In my JES2PARM, in the definition of the job class that I'd run this job in, I specify SYSSYM=ALLOW. I'm sure you could put this in dynamically with a $T of some sort. You'll also need the two periods as Rob stated.

Andrew Arentsen
Senior Mainframe Systems Engineer




From: "Sean Gleann" <***@GMAIL.COM>
To: IBM-***@LISTSERV.UA.EDU
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL
Sent by: "IBM Mainframe Discussion List" <IBM-***@LISTSERV.UA.EDU>



I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error

Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Rob Schramm
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Sean Gleann
2018-06-06 15:18:43 UTC
Permalink
Raw Message
Thanks all - the SYSSYM bit was the missing link.

I've defined that and now all is well.

Dave's last comment regarding 'unpredictable results' is a bit worrying.
Have there been problems with using these symbols?

Personally I feel it's a pity that SYSSYM has to be specifically turned on
or off at all. These dynamic symbols are SO useful!
I'd like to see the idea extended to cover 'yesterday', 'previous work
day', 'beginning of the month', etc.

Thanks once again

Sean

On 6 June 2018 at 16:03, Jousma, David <
Post by Jousma, David
Is anyone else pushing back on turning on batch system symbol support?
We've yet to do so, for the very reasons that IBM hadn’t supported in
batch all along. My main concern is unpredictable results.
Am I worrying for nothing?
_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H
p 616.653.8429
f 616.653.2717
-----Original Message-----
Behalf Of Carmen Vitullo
Sent: Wednesday, June 06, 2018 10:49 AM
Subject: Re: Use of dynamic system symbols in JCL
**CAUTION EXTERNAL EMAIL**
**DO NOT open attachments or click on links from unknown senders or unexpected emails**
Yep, need to make sure SYSSYM=ALLOW for that jobclass,
CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW
in a STC I run at IPL time I do about the same....
//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR
//SYSTSPRT DD DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10 //SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....
Carmen Vitullo
----- Original Message -----
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL
In my JES2PARM, in the definition of the job class that I'd run this job
in, I specify SYSSYM=ALLOW. I'm sure you could put this in dynamically with
a $T of some sort. You'll also need the two periods as Rob stated.
Andrew Arentsen
Senior Mainframe Systems Engineer
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL
I understand what you're saying Rob, but that was one of the variants I
tried. It still produces the same error
Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Rob Schramm
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Jousma, David
2018-06-06 15:27:41 UTC
Permalink
Raw Message
Ok, wasn’t the issue all those years ago with regards to *when* the system symbols get resolved? Interpreter time vs execution time and those things occurring on potentially two different systems in the plex?

I could *easily* be mis-remembering.
_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
***@53.com
1830 East Paris, Grand Rapids, MI  49546 MD RSCB2H
p 616.653.8429
f 616.653.2717


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Sean Gleann
Sent: Wednesday, June 06, 2018 11:19 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

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Thanks all - the SYSSYM bit was the missing link.

I've defined that and now all is well.

Dave's last comment regarding 'unpredictable results' is a bit worrying.
Have there been problems with using these symbols?

Personally I feel it's a pity that SYSSYM has to be specifically turned on or off at all. These dynamic symbols are SO useful!
I'd like to see the idea extended to cover 'yesterday', 'previous work day', 'beginning of the month', etc.

Thanks once again

Sean
Post by Jousma, David
Is anyone else pushing back on turning on batch system symbol support?
We've yet to do so, for the very reasons that IBM hadn’t supported in
batch all along. My main concern is unpredictable results.
Am I worrying for nothing?
_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f
616.653.2717
-----Original Message-----
On Behalf Of Carmen Vitullo
Sent: Wednesday, June 06, 2018 10:49 AM
Subject: Re: Use of dynamic system symbols in JCL
**CAUTION EXTERNAL EMAIL**
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Yep, need to make sure SYSSYM=ALLOW for that jobclass,
CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW
in a STC I run at IPL time I do about the same....
//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR //SYSTSPRT DD
DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10 //SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....
Carmen Vitullo
----- Original Message -----
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL
In my JES2PARM, in the definition of the job class that I'd run this
job in, I specify SYSSYM=ALLOW. I'm sure you could put this in
dynamically with a $T of some sort. You'll also need the two periods as Rob stated.
Andrew Arentsen
Senior Mainframe Systems Engineer
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL Sent by: "IBM
I understand what you're saying Rob, but that was one of the variants
I tried. It still produces the same error
Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Rob Schramm
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Jerry Whitteridge
2018-06-06 15:49:27 UTC
Permalink
Raw Message
Yes - and that's why we also haven't turned the use on.

Jerry Whitteridge
Delivery Manager / Mainframe Architect
GTS - Safeway Account
602 527 4871 Mobile
***@ibm.com

IBM Services
Date: 06/06/2018 08:35 AM
Subject: Re: Use of dynamic system symbols in JCL
Ok, wasn’t the issue all those years ago with regards to *when* the
system symbols get resolved? Interpreter time vs execution time and
those things occurring on potentially two different systems in the plex?
I could *easily* be mis-remembering.
_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
1830 East Paris, Grand Rapids, MI  49546 MD RSCB2H
p 616.653.8429
f 616.653.2717
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Carmen Vitullo
2018-06-06 15:50:59 UTC
Permalink
Raw Message
I do recall one issue with NDM batch, when we moved the NDM workload to use both systems in the MAS, symbols get resolved at interpreter/conversion time, we submit on system A, and it's setup to run on system B, using &SYSNAME was the issue, so some job class rules needed to be added to make sure specific workloads were submitted and run on the correct system using these symbols



Carmen Vitullo

----- Original Message -----

From: "David Jousma" <000001a0403c5dc1-dmarc-***@LISTSERV.UA.EDU>
To: IBM-***@LISTSERV.UA.EDU
Sent: Wednesday, June 6, 2018 10:27:28 AM
Subject: Re: Use of dynamic system symbols in JCL

Ok, wasn’t the issue all those years ago with regards to *when* the system symbols get resolved? Interpreter time vs execution time and those things occurring on potentially two different systems in the plex?

I could *easily* be mis-remembering.
_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
***@53.com
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H
p 616.653.8429
f 616.653.2717


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Sean Gleann
Sent: Wednesday, June 06, 2018 11:19 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

**CAUTION EXTERNAL EMAIL**

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Thanks all - the SYSSYM bit was the missing link.

I've defined that and now all is well.

Dave's last comment regarding 'unpredictable results' is a bit worrying.
Have there been problems with using these symbols?

Personally I feel it's a pity that SYSSYM has to be specifically turned on or off at all. These dynamic symbols are SO useful!
I'd like to see the idea extended to cover 'yesterday', 'previous work day', 'beginning of the month', etc.

Thanks once again

Sean
Post by Jousma, David
Is anyone else pushing back on turning on batch system symbol support?
We've yet to do so, for the very reasons that IBM hadn’t supported in
batch all along. My main concern is unpredictable results.
Am I worrying for nothing?
_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f
616.653.2717
-----Original Message-----
On Behalf Of Carmen Vitullo
Sent: Wednesday, June 06, 2018 10:49 AM
Subject: Re: Use of dynamic system symbols in JCL
**CAUTION EXTERNAL EMAIL**
**DO NOT open attachments or click on links from unknown senders or unexpected emails**
Yep, need to make sure SYSSYM=ALLOW for that jobclass,
CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW
in a STC I run at IPL time I do about the same....
//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR //SYSTSPRT DD
DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10 //SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....
Carmen Vitullo
----- Original Message -----
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL
In my JES2PARM, in the definition of the job class that I'd run this
job in, I specify SYSSYM=ALLOW. I'm sure you could put this in
dynamically with a $T of some sort. You'll also need the two periods as Rob stated.
Andrew Arentsen
Senior Mainframe Systems Engineer
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL Sent by: "IBM
I understand what you're saying Rob, but that was one of the variants
I tried. It still produces the same error
Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Rob Schramm
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Steve Smith
2018-06-06 15:51:40 UTC
Permalink
Raw Message
This has been previously discussed. The main issue (as usual) is
incompatibility with an ancient bug (or feature). Specifically, temporary
dataset names such as DSN=&TMP. That's supposed to be DSN=&&TMP, but for
whatever reason, the single-& version works, unless &TMP is a symbol.

As to which system, that has obvious solutions.

sas

On Wed, Jun 6, 2018 at 11:27 AM, Jousma, David <
Post by Jousma, David
Ok, wasn’t the issue all those years ago with regards to *when* the system
symbols get resolved? Interpreter time vs execution time and those things
occurring on potentially two different systems in the plex?
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Ed Jaffe
2018-06-09 18:24:49 UTC
Permalink
Raw Message
Post by Steve Smith
This has been previously discussed. The main issue (as usual) is
incompatibility with an ancient bug (or feature). Specifically, temporary
dataset names such as DSN=&TMP. That's supposed to be DSN=&&TMP, but for
whatever reason, the single-& version works, unless &TMP is a symbol.
Wow! I confirmed this is an exposure! I never knew!

IBM does not mention the single ampersand being valid temporary data set
name syntax in the description of the DSNAME parameter on the DD
statement and I have previously not seen it used that way.
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieab600/iea3b6_Syntax25.htm

This reminds me of the rule in REXX where use of an uninitialized
variable results in the variable name itself being substituted. But,
that is documented behavior. This is just plain wrong.

It might be a good use of the common tracker component (GTZ) to help
identify JCL with such errors. Otherwise, every new symbol added -- to
the system, to a proc, to anything that might have visibility to a job
stream -- can lead to unexpected JCL errors.
--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/
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Sri h Kolusu
2018-06-06 15:58:25 UTC
Permalink
Raw Message
Post by Sean Gleann
I'd like to see the idea extended to cover 'yesterday', 'previous work
day', 'beginning of the month', etc.

Sean,

You can currently use DFSORT to generate these dates as SET variables for
you and then have it in a PDS member so that you can use it as an INCLUDE
statements. This will work with any given date.

NEXTDday can be used to calculate the next specified day for a date field.
So for example if you wanted the next Friday then you would use NEXTDFRI

PREVDday can be used to calculate the previous specified day for a date
field. So for example if you wanted the previous Wednesday , then you
would use PREVDWED.

LASTDAYW, LASTDAYM, LASTDAYQ or LASTDAYY can be used to calculate the last
day of the week, month, quarter or year for a date field.

Thanks,
Kolusu
DFSORT Development
IBM Corporation

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Beesley, Paul
2018-06-07 07:27:17 UTC
Permalink
Raw Message
Yes, we've only just turned it on in a couple of test systems.
My concern is what impact it will have on systems where the job scheduler does its own symbolic substitution (e.g.CA7) and I will follow this thread with interest

Paul

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Jousma, David
Sent: Wednesday, June 06, 2018 4:04 PM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

Is anyone else pushing back on turning on batch system symbol support? We've yet to do so, for the very reasons that IBM hadn’t supported in batch all along. My main concern is unpredictable results.

Am I worrying for nothing?

_________________________________________________________________
Dave Jousma
Manager Mainframe Engineering, Assistant Vice President ***@53.com
1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f 616.653.2717

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Carmen Vitullo
Sent: Wednesday, June 06, 2018 10:49 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

**CAUTION EXTERNAL EMAIL**

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Yep, need to make sure SYSSYM=ALLOW for that jobclass,



CLASS og XBMProc DupJob JobRC Active SysSym
1 PIN) NO MAXRC YES ALLOW
2 PIN) NO MAXRC YES ALLOW




in a STC I run at IPL time I do about the same....



//CLEAN EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=EXECSYS
DEL 'ATTS.PROD.&SYSNAME..IPLINFO'
/*
//IPLINFO EXEC PGM=IKJEFT01,REGION=0M,PARM='IPLINFO',
// DYNAMNBR=99
//SYSEXEC DD DSN=TS.USER.REXX,DISP=SHR
//SYSTSPRT DD DSN=ATTS.PROD.&SYSNAME..IPLINFO,DISP=(,CATLG),
// UNIT=SYSDA,SPACE=(TRK,(25,5),RLSE),
// RECFM=FBA,LRECL=134,BLKSIZE=0
//SYSTSIN DD DUMMY
//*
//IEBCOPY1 EXEC PGM=IEBCOPY,REGION=2M,TIME=10 //SYSPRINT DD SYSOUT=*
//SYSUT1 DD DISP=SHR,DSN=SYS1.&SYSNAME..PARMLIB
//SYSUT2 DD DISP=(,CATLG),
// DSN=ATTS.PROD.SYSA.D&LYYMMDD..T&LHHMMSS..PARMLIB,
// UNIT=SYSALLDA,SPACE=(CYL,(10,1,75),RLSE)
of course STC ....



Carmen Vitullo

----- Original Message -----

From: "Andrew Arentsen" <***@ACUITY.COM>
To: IBM-***@LISTSERV.UA.EDU
Sent: Wednesday, June 6, 2018 9:43:25 AM
Subject: Re: Use of dynamic system symbols in JCL

In my JES2PARM, in the definition of the job class that I'd run this job in, I specify SYSSYM=ALLOW. I'm sure you could put this in dynamically with a $T of some sort. You'll also need the two periods as Rob stated.

Andrew Arentsen
Senior Mainframe Systems Engineer




From: "Sean Gleann" <***@GMAIL.COM>
To: IBM-***@LISTSERV.UA.EDU
Date: 06/06/2018 09:35 AM
Subject: Re: Use of dynamic system symbols in JCL Sent by: "IBM Mainframe Discussion List" <IBM-***@LISTSERV.UA.EDU>



I understand what you're saying Rob, but that was one of the variants I tried. It still produces the same error

Sean
Post by Rob Schramm
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Vernooij, Kees - KLM , ITOPT1
2018-06-06 14:37:06 UTC
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Raw Message
I only get this error if the variable has not been defined. Have you defined it?

Kees.
-----Original Message-----
Behalf Of Rob Schramm
Sent: 06 June, 2018 16:29
Subject: Re: Use of dynamic system symbols in JCL
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Sean Gleann
2018-06-06 14:40:07 UTC
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Hi Kees

"Have I defined it"? In a SET statement you mean?
I didn't think you had to, LYYMMDD is a system-defined dynamic symbol,
isn't it?

Sean

On 6 June 2018 at 15:36, Vernooij, Kees (ITOPT1) - KLM <
Post by Vernooij, Kees - KLM , ITOPT1
I only get this error if the variable has not been defined. Have you defined it?
Kees.
-----Original Message-----
Behalf Of Rob Schramm
Sent: 06 June, 2018 16:29
Subject: Re: Use of dynamic system symbols in JCL
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the
same
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't see
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Vernooij, Kees - KLM , ITOPT1
2018-06-07 06:17:51 UTC
Permalink
Raw Message
Hi Sean,
It is not in my 2.2 system. Are you at 2.3?

Kees.
-----Original Message-----
Behalf Of Sean Gleann
Sent: 06 June, 2018 16:40
Subject: Re: Use of dynamic system symbols in JCL
Hi Kees
"Have I defined it"? In a SET statement you mean?
I didn't think you had to, LYYMMDD is a system-defined dynamic symbol,
isn't it?
Sean
On 6 June 2018 at 15:36, Vernooij, Kees (ITOPT1) - KLM <
Post by Vernooij, Kees - KLM , ITOPT1
I only get this error if the variable has not been defined. Have you defined it?
Kees.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-
Behalf Of Rob Schramm
Sent: 06 June, 2018 16:29
Subject: Re: Use of dynamic system symbols in JCL
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's
date.
Post by Vernooij, Kees - KLM , ITOPT1
Post by Sean Gleann
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get
the
Post by Vernooij, Kees - KLM , ITOPT1
same
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't
see
Post by Vernooij, Kees - KLM , ITOPT1
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
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Beesley, Paul
2018-06-07 07:23:11 UTC
Permalink
Raw Message
It's in my 2.1 system

Symbol Value Type
&LYR4. 2018 Dynamic
&LYYMMDD. 180607 Dynamic

Paul

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Vernooij, Kees (ITOPT1) - KLM
Sent: Thursday, June 07, 2018 7:04 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

Hi Sean,
It is not in my 2.2 system. Are you at 2.3?

Kees.
-----Original Message-----
On Behalf Of Sean Gleann
Sent: 06 June, 2018 16:40
Subject: Re: Use of dynamic system symbols in JCL
Hi Kees
"Have I defined it"? In a SET statement you mean?
I didn't think you had to, LYYMMDD is a system-defined dynamic symbol,
isn't it?
Sean
On 6 June 2018 at 15:36, Vernooij, Kees (ITOPT1) - KLM <
Post by Vernooij, Kees - KLM , ITOPT1
I only get this error if the variable has not been defined. Have you defined it?
Kees.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-
Behalf Of Rob Schramm
Sent: 06 June, 2018 16:29
Subject: Re: Use of dynamic system symbols in JCL
You need 2 dots after symbol.. otherwise nodeis GT 8 characters
Rob
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's
date.
Post by Vernooij, Kees - KLM , ITOPT1
Post by Sean Gleann
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get
the
Post by Vernooij, Kees - KLM , ITOPT1
same
Post by Sean Gleann
failure.
I'm almost certainly doing something stupid, but right now I can't
see
Post by Vernooij, Kees - KLM , ITOPT1
the
Post by Sean Gleann
wood for the trees...
Help... Please...
Sean Gleann
----------------------------------------------------------------
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Post by Sean Gleann
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Post by Vernooij, Kees - KLM , ITOPT1
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Post by Vernooij, Kees - KLM , ITOPT1
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sender immediately by return e-mail, and delete this message.
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its
Post by Vernooij, Kees - KLM , ITOPT1
employees shall not be liable for the incorrect or incomplete
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of this e-mail or any attachments, nor responsible for any delay in
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registered
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number 33014286
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Jesse 1 Robinson
2018-06-06 16:28:18 UTC
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To summarize IBM's long-standing reticence on system symbols in batch.

-- A system symbol might clash with an existing JCL proc symbol with unpredictable results.
-- A system symbol in batch may get resolved/substituted at an unexpected point in processing.

By contrast, there is less danger in allowing symbols in STC or TSO because (a) substitution is immediate on the current LPAR and (b) STC and TSO JCL is owned by sysprogs who have the knowledge and power to fix any problems.

By allowing symbols on a class by class basis, IBM has placed the onus on each shop to determine suitability and move as fast or slow as feels comfortable. Given the complexity of possible problems, I personally think the solution as delivered is both safe and comprehensive. Turning symbol substitution on or off is simple and dynamic. But not 'automatic'.

.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-543-6132 Office ⇐=== NEW
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-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Sri h Kolusu
Sent: Wednesday, June 06, 2018 8:58 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: (External):Re: Use of dynamic system symbols in JCL
Post by Sean Gleann
I'd like to see the idea extended to cover 'yesterday', 'previous
work
day', 'beginning of the month', etc.

Sean,

You can currently use DFSORT to generate these dates as SET variables for you and then have it in a PDS member so that you can use it as an INCLUDE statements. This will work with any given date.

NEXTDday can be used to calculate the next specified day for a date field.
So for example if you wanted the next Friday then you would use NEXTDFRI

PREVDday can be used to calculate the previous specified day for a date
field. So for example if you wanted the previous Wednesday , then you
would use PREVDWED.

LASTDAYW, LASTDAYM, LASTDAYQ or LASTDAYY can be used to calculate the last day of the week, month, quarter or year for a date field.

Thanks,
Kolusu
DFSORT Development
IBM Corporation


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Paul Gilmartin
2018-06-06 17:26:17 UTC
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Post by Steve Smith
This has been previously discussed. The main issue (as usual) is
incompatibility with an ancient bug (or feature). Specifically, temporary
dataset names such as DSN=&TMP. That's supposed to be DSN=&&amp;TMP, but for
whatever reason, the single-& version works, unless &TMP is a symbol.
Bug? Feature? I call it a primeval bad design. Any use of an undefined symbol
should always have resulted in a JCL error.

Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?

When to double ampersands and apostrophes get resolved? I believe that
regardless of MSGLEVEL, when I code:
//EXEC PGM=IEFBR14,PARM='O''Reilly &&amp;SYSUID &SYUID'
//SET RFM=FB
//SYSUT2 DD DISP=(,PASS),DSN=&&amp;TMP,RECFM=&RFM,

... I still see double ampersands and double apostrophes in the JCL
substitution messages, but they are collapsed by the time the program
inspects its PARM.

-- gil

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Seymour J Metz
2018-06-06 18:02:23 UTC
Permalink
Raw Message
Post by Paul Gilmartin
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://bitsavers.org/pdf/ibm/360/os/R01-08/C28-6539-4_OS_JCL_Mar67.pdf>


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List <IBM-***@listserv.ua.edu> on behalf of Paul Gilmartin <0000000433f07816-dmarc-***@listserv.ua.edu>
Sent: Wednesday, June 6, 2018 1:26 PM
To: IBM-***@listserv.ua.edu
Subject: Re: Use of dynamic system symbols in JCL
Post by Paul Gilmartin
This has been previously discussed. The main issue (as usual) is
incompatibility with an ancient bug (or feature). Specifically, temporary
dataset names such as DSN=&TMP. That's supposed to be DSN=&&amp;TMP, but for
whatever reason, the single-& version works, unless &TMP is a symbol.
Bug? Feature? I call it a primeval bad design. Any use of an undefined symbol
should always have resulted in a JCL error.

Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?

When to double ampersands and apostrophes get resolved? I believe that
regardless of MSGLEVEL, when I code:
//EXEC PGM=IEFBR14,PARM='O''Reilly &&amp;SYSUID &SYUID'
//SET RFM=FB
//SYSUT2 DD DISP=(,PASS),DSN=&&amp;TMP,RECFM=&RFM,

... I still see double ampersands and double apostrophes in the JCL
substitution messages, but they are collapsed by the time the program
inspects its PARM.

-- gil

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Paul Gilmartin
2018-06-06 17:47:02 UTC
Permalink
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Post by Jesse 1 Robinson
To summarize IBM's long-standing reticence on system symbols in batch.
-- A system symbol might clash with ae existing JCL proc symbol with unpredictable results.
-- A system symbol in batch may get resolved/substituted at an unexpected point in processing.
This could have dreadful consequences for an ISV who can't control any customer's
setting of SYSSYM or of particular symbols.

The maxim is, "Define all symbols you use and double all ampersands not intended
to introduce symbols."

-- gil

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Paul Gilmartin
2018-06-06 18:52:45 UTC
Permalink
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Post by Seymour J Metz
Post by Paul Gilmartin
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://bitsavers.org/pdf/ibm/360/os/R01-08/C28-6539-4_OS_JCL_Mar67.pdf>
Thanks. Do I correctly see:

o No PROC statement?

o No instream PROCs?

Was "DSN=&name" the only use of "&" in JCL at that OS release?

-- gil

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Seymour J Metz
2018-06-06 19:06:30 UTC
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As I recall they came in with R14.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

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From: IBM Mainframe Discussion List <IBM-***@listserv.ua.edu> on behalf of Paul Gilmartin <0000000433f07816-dmarc-***@listserv.ua.edu>
Sent: Wednesday, June 6, 2018 2:52 PM
To: IBM-***@listserv.ua.edu
Subject: Re: Use of dynamic system symbols in JCL
Post by Paul Gilmartin
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://secure-web.cisco.com/1uov7rGc-t0NPyZsdcMnPGPEeDQO1mJSyuzQD7x1uxGpsYyGjc7Iepvum1y25CxN8SM-En7FCoESH2X34K1Kmw_nXv-X0jrcA3cceOBT9GfIrad06DY3-cnOW_gf4j7DBj80PDAelaETSvzgg8xwpzZpzB_FIpVdCicFi3Zx1EFxJXdbM0L2bj6HICWwvxMm0xiNfGCn3vLgOjEDPG7oWle5zhotRGEnmDz3uhIYuzy57DwYjlqrnXn6WKS4y4AvStjKNzXvwItWdNjBrhwXxOHqjBFtue-TZUoy_7SsQhufxJqXfgaoEUY_iVbvICHMdd2TnSz4kdMm8oeblEdb_F5T64imeJ-CGJsfXWKS2fQKV9_a8vOyhXe9daMkZsg0sqZqn7l3XEdFLxtZHkF8Di1ueP1W9tPwPrDFxG4YmeQJkuAhZ9Ng9oj2Xhn-rMdoq/http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F360%2Fos%2FR01-08%2FC28-6539-4_OS_JCL_Mar67.pdf>
Thanks. Do I correctly see:

o No PROC statement?

o No instream PROCs?

Was "DSN=&name" the only use of "&" in JCL at that OS release?

-- gil

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Lizette Koehler
2018-06-06 22:17:14 UTC
Permalink
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Just in case it was not mentioned,

If you have scheduling software, you might be able to get what you want.

Or you can write a rexx to create the JCL with what you want.

Lizette
-----Original Message-----
Sean Gleann
Sent: Wednesday, June 06, 2018 7:27 AM
Subject: Use of dynamic system symbols in JCL
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see the
wood for the trees...
Help... Please...
Sean Gleann
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Steve Coalbran
2018-06-08 13:43:43 UTC
Permalink
Raw Message
Hi Lizette,
I have a UDLC (User Defined Line Command) for our group.
DJ - Displays Job status info.
It creates a list of assignment SET statements in JCL for each of: SYSVAR, MVSVAR, MVSVAR SYMDEF, and then does the same for System Symbols (trapped from SDSF command -D SYMBOLS).
Then I extract only the ones which get SUBSTITUTION values in the Job.
I place a dummy TYPRUN=SCAN jobcard ahead.
Then it proceeds to SCAN the actual JOB JCL (omitted)...
(use a non-proportional font to read the output...)


VIEW N472730.USER.JCL(UDLCTEST) - 01.62 Columns 00001 00072
Command ===> Scroll ===> CSR
****** ***************************** Top of Data ******************************
000001 //UDLCTEST JOB (SJ,T),'UDLC TEST CASES',
000002 // MSGCLASS=X,
000003 // CLASS=A,
000004 // SCHENV=UMVS0,
000005 //* SCHENV=UMVS0NO, NOTFOUND
dj // NOTIFY=&SYSUID, SYMBOLS
000007 // TYPRUN=COPY

Here it may be issued on any Job line except those with: CLASS, MSGCLASS, or SCHENV.
These jump to trap SDSF an ÅD JOBCLASS(*),MSGCLASS,SCHENV command (Å is the JES prefix here, Å≡$)
I have a string of other UDLCs performing different functions.


gives...




VIEW SDSF SUBSTITUTION FOR SYMBOLS SYMBOL SUBSTITUTION
Command ===> Scroll ===> CSR
****** ***************************** Top of Data ******************************
000013 //*------- SYSVARS -------------------------------------------
000017 IEFC653I SUBSTITUTION JCL - SYSUID=N472730
000047 //*------- MVSVARS -------------------------------------------
000052 IEFC653I SUBSTITUTION JCL - SYSNAME=MVS0
000058 IEFC653I SUBSTITUTION JCL - SYSCLONE=M0
000060 //*------- SYMDEFS -------------------------------------------
000061 IEFC653I SUBSTITUTION JCL - SYSPLEX=UPLEX
000063 IEFC653I SUBSTITUTION JCL - SYSALVL=2
000065 IEFC653I SUBSTITUTION JCL - SYSCLONE=M0
000067 IEFC653I SUBSTITUTION JCL - SYSNAME=MVS0
000069 IEFC653I SUBSTITUTION JCL - SYSOSLVL=Z1020200
000071 IEFC653I SUBSTITUTION JCL - SYSPLEX=UPLEX
000073 IEFC653I SUBSTITUTION JCL - SYSR1=Z51YP1
000075 IEFC653I SUBSTITUTION JCL - CCC=Z
000077 IEFC653I SUBSTITUTION JCL - CEC=32
000079 IEFC653I SUBSTITUTION JCL - CNMVER=Y
000081 IEFC653I SUBSTITUTION JCL - CNMVOL=Z51YP1
000083 IEFC653I SUBSTITUTION JCL - COMCEC=C
000085 IEFC653I SUBSTITUTION JCL - COMMSUF=00
000087 IEFC653I SUBSTITUTION JCL - COUNTRY=SE
000089 IEFC653I SUBSTITUTION JCL - DB2VER=d
000091 IEFC653I SUBSTITUTION JCL - HRDWNAME=CE32CB
000093 IEFC653I SUBSTITUTION JCL - ICSFPROG=CSFINIT
000095 IEFC653I SUBSTITUTION JCL - JESSVOL=SPL06
000097 IEFC653I SUBSTITUTION JCL - JES2APPL=SENBNJE0
000099 IEFC653I SUBSTITUTION JCL - JES2NODE=SENBSU0
000101 IEFC653I SUBSTITUTION JCL - LOC=V
000103 IEFC653I SUBSTITUTION JCL - LPARNAME=LP3206
000105 IEFC653I SUBSTITUTION JCL - MASMEM=2
000107 IEFC653I SUBSTITUTION JCL - MQEXIT=01
000109 IEFC653I SUBSTITUTION JCL - MQLVL=800C
000111 IEFC653I SUBSTITUTION JCL - MST1=0020
000113 IEFC653I SUBSTITUTION JCL - OM=22
000115 IEFC653I SUBSTITUTION JCL - OSLEVEL=020200
000117 IEFC653I SUBSTITUTION JCL - PLEXID=UP
000119 IEFC653I SUBSTITUTION JCL - PLPASUF=00
000121 IEFC653I SUBSTITUTION JCL - PLX=51
000123 IEFC653I SUBSTITUTION JCL - RMFOPT1=
000125 IEFC653I SUBSTITUTION JCL - SMFID=MVS0
000127 IEFC653I SUBSTITUTION JCL - SYSCAT=UCATUP
000129 IEFC653I SUBSTITUTION JCL - SYSNBR=0
000131 IEFC653I SUBSTITUTION JCL - SYSR2=Z51YP1
000133 IEFC653I SUBSTITUTION JCL - USRPLEX=PLEX51
000135 IEFC653I SUBSTITUTION JCL - USSROOT=Z51YP1
000137 IEFC653I SUBSTITUTION JCL - VMUSERID=+++++
000139 IEFC653I SUBSTITUTION JCL - ZVER=Y
000141 //*------- SYMBOLS -------------------------------------------
000142 IEFC653I SUBSTITUTION JCL - JOBNAME=JES2
000144 IEFC653I SUBSTITUTION JCL - SYSALVL=2
000146 IEFC653I SUBSTITUTION JCL - SYSCLONE=M0
000148 IEFC653I SUBSTITUTION JCL - SYSNAME=MVS0
000148 IEFC653I SUBSTITUTION JCL - SYSNAME=MVS0
000150 IEFC653I SUBSTITUTION JCL - SYSOSLVL=Z1020200
000152 IEFC653I SUBSTITUTION JCL - SYSPLEX=UPLEX
000154 IEFC653I SUBSTITUTION JCL - SYSR1=Z51YP1
000156 IEFC653I SUBSTITUTION JCL - ASNVER=a
000158 IEFC653I SUBSTITUTION JCL - CCC=Z
000160 IEFC653I SUBSTITUTION JCL - CEC=32
000162 IEFC653I SUBSTITUTION JCL - CNMVER=Y
000164 IEFC653I SUBSTITUTION JCL - CNMVOL=Z51YP1
000166 IEFC653I SUBSTITUTION JCL - COMCEC=C
000168 IEFC653I SUBSTITUTION JCL - COMMSUF=00
000170 IEFC653I SUBSTITUTION JCL - COMODE=R
000172 IEFC653I SUBSTITUTION JCL - COUNTRY=SE
000174 IEFC653I SUBSTITUTION JCL - DB2VER=d
000176 IEFC653I SUBSTITUTION JCL - HRDWNAME=CE32CB
000178 IEFC653I SUBSTITUTION JCL - ICSFPROG=CSFINIT
000180 IEFC653I SUBSTITUTION JCL - IMSLVL=RSU1703
000182 IEFC653I SUBSTITUTION JCL - IMTOOLVL=V002
000184 IEFC653I SUBSTITUTION JCL - JESSVOL=SPL06
000186 IEFC653I SUBSTITUTION JCL - JES2APPL=SENBNJE0
000188 IEFC653I SUBSTITUTION JCL - JES2NODE=SENBSU0
000190 IEFC653I SUBSTITUTION JCL - LFM1MB=0000
000192 IEFC653I SUBSTITUTION JCL - LFT1MB=2000
000194 IEFC653I SUBSTITUTION JCL - LOC=V
000196 IEFC653I SUBSTITUTION JCL - LPARNAME=LP3206
000198 IEFC653I SUBSTITUTION JCL - MASMEM=2
000198 IEFC653I SUBSTITUTION JCL - MASMEM=2
000200 IEFC653I SUBSTITUTION JCL - MQEXIT=01
000202 IEFC653I SUBSTITUTION JCL - MQLVL=800C
000204 IEFC653I SUBSTITUTION JCL - MST1=0020
000206 IEFC653I SUBSTITUTION JCL - OM=22
000208 IEFC653I SUBSTITUTION JCL - OSLEVEL=020200
000210 IEFC653I SUBSTITUTION JCL - PLEXID=UP
000212 IEFC653I SUBSTITUTION JCL - PLPASUF=00
000214 IEFC653I SUBSTITUTION JCL - PLX=51
000216 IEFC653I SUBSTITUTION JCL - RMFOPT1=
000218 IEFC653I SUBSTITUTION JCL - SMFID=MVS0
000220 IEFC653I SUBSTITUTION JCL - SYSCAT=UCATUP
000222 IEFC653I SUBSTITUTION JCL - SYSNBR=0
000224 IEFC653I SUBSTITUTION JCL - SYSR2=Z51YP1
000226 IEFC653I SUBSTITUTION JCL - USRPLEX=PLEX51
000228 IEFC653I SUBSTITUTION JCL - USRTADZ=ENSH
000230 IEFC653I SUBSTITUTION JCL - USSROOT=Z51YP1
000232 IEFC653I SUBSTITUTION JCL - VMUSERID=+++++
000234 IEFC653I SUBSTITUTION JCL - ZVER=Y
000236 //*------- END SYM -------------------------------------------
000237 //*
000238 //*------- JOB JCL -------------------------------------------
...JCL resolved from job...

Un-shown lines are there but eXcluded with a HIDE X.

All of these symbols one can see are available to JCL interpretation?




________________________________
From: IBM Mainframe Discussion List <IBM-***@LISTSERV.UA.EDU> on behalf of Lizette Koehler <***@MINDSPRING.COM>
Sent: 06 June 2018 22:17
To: IBM-***@LISTSERV.UA.EDU
Subject: Re: Use of dynamic system symbols in JCL

Just in case it was not mentioned,

If you have scheduling software, you might be able to get what you want.

Or you can write a rexx to create the JCL with what you want.

Lizette
-----Original Message-----
Sean Gleann
Sent: Wednesday, June 06, 2018 7:27 AM
Subject: Use of dynamic system symbols in JCL
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see the
wood for the trees...
Help... Please...
Sean Gleann
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R.S.
2018-06-07 11:23:17 UTC
Permalink
Raw Message
The problem is you cannot use it in batch job. The documentation is
*incorrect* - among many "working" symbols it provides few actually not
working.
Simple test: copy all of the symbols to a job, make DSN=&S1..&S2..&S3.. 
etc. Don't worry about DSNname syntax. Then submit the job with
TYPRUN=SCAN and watch the output. You will see which symbols were
substituted and which symbols left unrecongnized.
--
Radoslaw Skorupka
Lodz, Poland
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see the
wood for the trees...
Help... Please...
======================================================================


--
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Steve Horein
2018-06-07 12:39:35 UTC
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I used this JCL:
//<job card>
//*
//SYMBOLS EXPORT SYMLIST=*
//STEP1 EXEC PGM=IEFBR14
//*
//ISUP DD DISP=(NEW,CATLG),
// DSN=SH71167.IS.ACTIVE.ON.&SYSNAME..D&LYYMMDD.,
// SPACE=(TRK,(0,1)),
// LRECL=133,BLKSIZE=1330,RECFM=FB,
// VOL=SER=,
// UNIT=SYSDA

And got these results:
IEF236I ALLOC. FOR SH71167T STEP1
IGD101I SMS ALLOCATED TO DDNAME (ISUP )
DSN (SH71167.IS.ACTIVE.ON.CP9S.D180607 )
STORCLAS (PERF1) MGMTCLAS (TMAMLYBW) DATACLAS ( )
VOL SER NOS= SH9DAU
IEF142I SH71167T STEP1 - STEP WAS EXECUTED - COND CODE 0000

Are you specifying "EXPORT SYMLIST" in your JCL?
Post by Sean Gleann
Can anyone point out what I'm doing wrong here, please?
I'm trying to create a file with a name that features today's date.
//OUTFILE DD DSN=BACKUP.USERDALY.D&LYYMMDD.TER,
// DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(600,600),RLSE),
// DSORG=PS,RECFM=FB,BLKSIZE=27648,LRECL=1024
IEFC627I INCORRECT USE OF AMPERSAND IN THE DSN FIELD
I've tried numerous variants of this statement, but I always get the same
failure.
I'm almost certainly doing something stupid, but right now I can't see the
wood for the trees...
Help... Please...
Sean Gleann
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Peter Hunkeler
2018-06-07 19:34:19 UTC
Permalink
Raw Message
Post by Steve Horein
Are you specifying "EXPORT SYMLIST" in your JCL?
That one is not needed for system symbols to become available in batch JCL. It the jobclass SYSSYM=ALLOW | DISALLOW that decides. BTW, the symbols are resolved at conversion time.


The EXPORT SYMLIST is needed so that JCL symbols can be used on // DD * data. You also need SYMBOLS=JCLONLY | CNVTSYS | EXECSYS on the DD * statement. The later two enable system symbol replacement in DD * data irrespective of the SYSSYM= setting on the jobclass (IIRC).
--
Peter Hunkeler

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Steve Horein
2018-06-07 23:05:40 UTC
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Raw Message
Thanks!
I commented out that statement and got the same results to see with my own
eyes.
I also missed Sean's confirmation that "all is well" based on jobclass
updates.
Post by Peter Hunkeler
Post by Steve Horein
Are you specifying "EXPORT SYMLIST" in your JCL?
That one is not needed for system symbols to become available in batch
JCL. It the jobclass SYSSYM=ALLOW | DISALLOW that decides. BTW, the symbols
are resolved at conversion time.
The EXPORT SYMLIST is needed so that JCL symbols can be used on // DD *
data. You also need SYMBOLS=JCLONLY | CNVTSYS | EXECSYS on the DD *
statement. The later two enable system symbol replacement in DD * data
irrespective of the SYSSYM= setting on the jobclass (IIRC).
--
Peter Hunkeler
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Paul Gilmartin
2018-06-07 13:50:56 UTC
Permalink
Raw Message
No impact unless you happen to have conflicting symbols.
That shouldn't matter. If CA7 substitutes a symbol, downstream processors
will never see it as a symbol. However if CA7 does not perform a substitution
it's exposed for SYSSYM substitution.
-----Original Message-----
From: Beesley, Paul
Sent: Thursday, June 7, 2018 2:27 AM
Yes, we've only just turned it on in a couple of test systems.
My concern is what impact it will have on systems where the job scheduler does its own symbolic substitution (e.g.CA7) and I will follow this thread with interest
-- gil

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Jesse 1 Robinson
2018-06-09 18:41:54 UTC
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One modest step we take to avoid conflicts is to prefix installation-defined symbols with our SHARE installation code. That does not guarantee uniqueness, but no ISV is likely to stumble in, and I've never seen a production proc symbolic like that. This practice shortens the string of 'meaningful' characters, but programmers are a wily tribe.

Alternatively, a single national character prefix would likely ensure uniqueness as well.

.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-543-6132 Office ⇐=== NEW
***@sce.com


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-***@LISTSERV.UA.EDU] On Behalf Of Ed Jaffe
Sent: Saturday, June 09, 2018 11:25 AM
To: IBM-***@LISTSERV.UA.EDU
Subject: (External):Re: Use of dynamic system symbols in JCL
Post by Steve Smith
This has been previously discussed. The main issue (as usual) is
incompatibility with an ancient bug (or feature). Specifically,
temporary dataset names such as DSN=&TMP. That's supposed to be
DSN=&&TMP, but for whatever reason, the single-& version works, unless &TMP is a symbol.
Wow! I confirmed this is an exposure! I never knew!

IBM does not mention the single ampersand being valid temporary data set name syntax in the description of the DSNAME parameter on the DD statement and I have previously not seen it used that way.
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieab600/iea3b6_Syntax25.htm

This reminds me of the rule in REXX where use of an uninitialized variable results in the variable name itself being substituted. But, that is documented behavior. This is just plain wrong.

It might be a good use of the common tracker component (GTZ) to help identify JCL with such errors. Otherwise, every new symbol added -- to the system, to a proc, to anything that might have visibility to a job stream -- can lead to unexpected JCL errors.

--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/


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Paul Gilmartin
2018-06-09 22:05:08 UTC
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Raw Message
And I'm one of the perpetrators! For a long time I thought the single
asterisk was proper and whenever I saw the double I assumed it was a
mistake that just happened to work.
No, conventional behavior nowadays. JCL collapses a double ampersand to
a single, but supprsses symbol substitution.
Post by Paul Gilmartin
Post by Steve Smith
This has been previously discussed. The main issue (as usual) is
incompatibility with an ancient bug (or feature). Specifically, temporary
dataset names such as DSN=&TMP. That's supposed to be DSN=&&amp;TMP, but for
whatever reason, the single-& version works, unless &TMP is a symbol.
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://bitsavers.org/pdf/ibm/360/os/R01-08/C28-6539-4_OS_JCL_Mar67.pdf>
(See Page 23. There were *no* symbols in JCL then!)

-- gil

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Paul Gilmartin
2018-06-09 22:14:48 UTC
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Raw Message
Actually it is documented as well as using double ampersands for symbols (deferred usage) and the use of the ampersand as a part of the name.
Citation, please...
I'm lost. Neither Ed's ply nor Adam's informs me clearly of the antecedent of "it".
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://bitsavers.org/pdf/ibm/360/os/R01-08/C28-6539-4_OS_JCL_Mar67.pdf>
(See Page 23. There were *no* symbols in JCL then!)

[1116 bytes of lawyer crap snipped!]

-- gil

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Paul Gilmartin
2018-06-09 23:06:06 UTC
Permalink
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Post by Seymour J Metz
Post by Paul Gilmartin
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://bitsavers.org/pdf/ibm/360/os/R01-08/C28-6539-4_OS_JCL_Mar67.pdf>
OK. That says use DSNAME=&name. R21.7 and later say use DSNAME=&&amp;dsname.
What happens if JCL performs symbol substitution? For example

// SET A1='&TEMP'
// SET A2='&&amp;TEMP'
//*
//STEP EXEC PGM=IEFBR14
//D1 DD DSN=&A1 * Should be unsupported; only one ampersand after substitution.
//D1 DD DSN=&A2 * Should be accepted; two ampersands after substitution.

There's been enough confusion among experts in this forum that a clarifying
RCF seems appropriate. The existing doc antedates and takes scant account of
symbol substitution

-- gil

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Seymour J Metz
2018-06-10 21:17:59 UTC
Permalink
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Post by Paul Gilmartin
What happens if JCL performs symbol substitution?
I would expect that to be a valid temporary reference.
Post by Paul Gilmartin
R21.7 and later say use DSNAME=&&amp;dsname.
WTF is your e-mail clients doing with ampersands? It looks like it's trying to convert one of them to HTML but not the other. IAC, &&dsname evaluates to &dsname, which is a valid temporary as long as dsname adheres to the restrictions.
Post by Paul Gilmartin
// SET A2='&&amp;TEMP'
I would expect that to be an invalid temporary reference.
Post by Paul Gilmartin
There's been enough confusion among experts in this forum that a clarifying
RCF seems appropriate.
Couldn't hurt.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List <IBM-***@listserv.ua.edu> on behalf of Paul Gilmartin <0000000433f07816-dmarc-***@listserv.ua.edu>
Sent: Saturday, June 9, 2018 7:05 PM
To: IBM-***@listserv.ua.edu
Subject: Re: Use of dynamic system symbols in JCL
Post by Paul Gilmartin
Post by Paul Gilmartin
Except, does support of DSN=&TMP antedate any support of symbols in JCL,
not only by SET but also as PROC parameters?
Yes. Bitsavers is your friend. <http://secure-web.cisco.com/1kbHbNN0Khz9T3NKrHFBWAGWSoKIBMQnYXJseeVQHqjXS8-xUb-G0_5SLGhHTgA68rVUPiucTOurQKMSrP9eBk0Sgo1MuHBA1Zj3lUhEnNXbYxitjpcvCkIwegGS6YTGp6F98tjynb77DwL8zUphSE8QYnyaOLQHaYshouOuiCZM3fnpRn2P0MfAe--4Go1zNm15H6W1PN1M_ysAt1Adhj_S_wUV3yg4tD-UGRs0k5ZTNmuupQOg092x9HtPo8WYb-O2HSPBD0dsjZA9hTAmYYgRwLWJfiyCdlKIhjqkfDfyArSOQJm3_VOWko72uzEQ4Vm-qt_eNdcJ_Kp4rw4VlgdVnzmJjFUmyAK-RqIpnym3a7mI4ER7PJwr7Lsm6hCGSOuY1Hk0Nqr1hiw-RxX76smTjfzCEmE7Xlk2AUVlhCFqDetoED0LwXdG1mrbGWl8Y/http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F360%2Fos%2FR01-08%2FC28-6539-4_OS_JCL_Mar67.pdf>
OK. That says use DSNAME=&name. R21.7 and later say use DSNAME=&&amp;dsname.
What happens if JCL performs symbol substitution? For example

// SET A1='&TEMP'
// SET A2='&&amp;TEMP'
//*
//STEP EXEC PGM=IEFBR14
//D1 DD DSN=&A1 * Should be unsupported; only one ampersand after substitution.
//D1 DD DSN=&A2 * Should be accepted; two ampersands after substitution.

There's been enough confusion among experts in this forum that a clarifying
RCF seems appropriate. The existing doc antedates and takes scant account of
symbol substitution

-- gil

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Paul Gilmartin
2018-06-10 19:15:20 UTC
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This is the JCL Reference for z/OS 2.3 (page 183)
1. In general, the system treats a single ampersand (&) followed by a character string of 1 to 8 characters as a symbolic parameter. (See “Using system symbols and JCL symbols” on page 38.) However, if you code a data set name as a symbolic parameter (by coding DSNAME=&xxxxxxxx), and do not assign a value to or nullify the symbolic parameter, the system will process it as a temporary data set name.
Yes. Thanks. And the previous page, Op. cit. 182:

Data set name for temporary data set
...
When you use DSNAME for a temporary data set, code the name as two ampersands (&&amp;) followed by a character string 1 to 8 characters in length:
o The first character following the ampersands must be alphabetic or national..
o The remaining characters must be alphanumeric or national.
The more I think about this, the less I like it. The Ref. gives a couple examples
in lieu of a formal rule, leaving it to the clever reader to infer that rule. There's
been much stumbling toward that ojective in this thread with statements such
as, "This seems to work, but I can't tell why."

Rather, I'd omit the "Note:" as quoted. That information appears elswhere the Ref.
and needn't appear redundantly here. Rather, page 182 should say:

Data set name for temporary data set
...
When you use DSNAME for a temporary data set, the equivalent JCL after symbol
substitution (as described on page 45, "Determining equivalent JCL") should be
a single ampersand (&) followed by a character string 1 to 8 characters in length:
o The first character following the ampersands must be alphabetic or national.
o The remaining characters must be alphanumeric or national.

This covers cases not currently described such as:
// SET TEMP='Who cares, anyway?'
// SET TTT='&TEMP'
//SYSUT2 DD DSN=&TTT,...

-- gil

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Gerhard Adam
2018-06-10 20:57:55 UTC
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I don't see what the issue is. It simply says that if you code a DSN as a symbol and it is not resolved, then the symbol name itself becomes the temporary DSN

I'm not clear on why anyone would care about this behavior?

Sent from my iPhone
Post by Paul Gilmartin
This is the JCL Reference for z/OS 2.3 (page 183)
1. In general, the system treats a single ampersand (&) followed by a character string of 1 to 8 characters as a symbolic parameter. (See “Using system symbols and JCL symbols” on page 38.) However, if you code a data set name as a symbolic parameter (by coding DSNAME=&xxxxxxxx), and do not assign a value to or nullify the symbolic parameter, the system will process it as a temporary data set name.
Data set name for temporary data set
...
o The first character following the ampersands must be alphabetic or national..
o The remaining characters must be alphanumeric or national.
The more I think about this, the less I like it. The Ref. gives a couple examples
in lieu of a formal rule, leaving it to the clever reader to infer that rule. There's
been much stumbling toward that ojective in this thread with statements such
as, "This seems to work, but I can't tell why."
Rather, I'd omit the "Note:" as quoted. That information appears elswhere the Ref.
Data set name for temporary data set
...
When you use DSNAME for a temporary data set, the equivalent JCL after symbol
substitution (as described on page 45, "Determining equivalent JCL") should be
o The first character following the ampersands must be alphabetic or national.
o The remaining characters must be alphanumeric or national.
// SET TEMP='Who cares, anyway?'
// SET TTT='&TEMP'
//SYSUT2 DD DSN=&TTT,...
-- gil
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