You cannot remove an existing DD statement from a PROC. You can only override 
it. Also, if the DD is a concatenation, you cannot eliminate subsequent, 
concatenated, DDs. You can only override the DSN with an "empty" DSN 
(sequential or PDS as needed). You can add more onto a concatenated DD.

We have SYS3.EMPTY.PDS and SYS3.EMPTY.SEQ datasets with no LRECL et al. just 
for these requirements.

--
John McKown 
Systems Engineer IV
IT

Administrative Services Group

HealthMarkets(r)

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> -----Original Message-----
> From: IBM Mainframe Discussion List 
> [mailto:ibm-m...@bama.ua.edu] On Behalf Of Charles Mills
> Sent: Thursday, December 09, 2010 1:06 PM
> To: IBM-MAIN@bama.ua.edu
> Subject: Overriding STEPLIB
> 
> All you JCL gurus, two questions regarding overriding a load 
> library in a
> PROC such as STEPLIB:
> 
> 1. If a PROC has something like
> 
> //STEPLIB  DD   DSN=whatever...
> //         DD   DSN=blah...
> 
> And you want to override it to a single load library, is 
> there a preferred
> way to do so? Coding
> 
> //PSTEP.STEPLIB DD DSN=foo...
> 
> Gives you an allocation of blah concatenated behind foo.
> 
> I can solve it with
> 
> //PSTEP.STEPLIB DD DSN=foo...
> //            DD DSN=foo...
> 
> But that seems like kind of a kludge.
> 
> 2. If a PROC has a DD statement and you want to make it go 
> away and "not
> exist" how do you do that? No, overriding it to DUMMY doesn't 
> work -- leads
> to S2013s or somesuch if it is STEPLIB. Again, I can solve it 
> by overriding
> it to an irrelevant load library, but that seems kind of 
> kludge also. Is
> there a preferred method?
> 
> Charles
> 
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