Submit an additional job with the same jobname.  Be sure to delay a
little bit until the first job is running..

On Sun, Nov 10, 2024 at 3:51 PM Seymour J Metz <sme...@gmu.edu> wrote:
>
> You can't, but there are some things that you can do on the fly.
>
> You can allocate and free datasets dynamcally with SVC 99, either directly or 
> using one of the IBM provided front ends. e.g., ALLOC, BPXWDYN.
>
> You can do a RDJFCB, modify, e.g., the member name, the file sequence number, 
> then OPEN TYPE=J.
>
> You can write a program to call another program with modified parameters.
>
> --
> Shmuel (Seymour J.) Metz
> http://mason.gmu.edu/~smetz3
> עַם יִשְׂרָאֵל חַי
> נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר
>
>
>
> ________________________________________
> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
> Steff Gladstone <000005c5038228fa-dmarc-requ...@listserv.ua.edu>
> Sent: Sunday, November 10, 2024 3:51 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Modifying JCL on the fly
>
> Caution: This email did not originate from George Mason’s mail system. Do not 
> click links or open attachments unless you recognize the sender and know the 
> content is safe.
>
>
> What is the best way of modifying JCL after the job has been
> submitted, in order to conditionally add another DDNAME to a JOB STEP?   Or
> perhaps adding parameters to the PARM string on the EXEC statement.
>
> We were thinking of using the IEFUSI exit point, allocating a file
> dynamically before the main program of the job-step is attached.  I gather
> there are also JES2 exits (are they simple exits or the more flexible exit
> points?) that are appropriate to the task and would be interested to hear
> advice from other system programmers.
>
> Two other questions: are these exits specified in the PARMLIB or via some
> other mechanism?  And what happens if the exit fails in some way?  What
> action does the system take?
>
> Thanks in advance,
> Steff Gladstone
>
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-- 
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?

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