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[Nithisha]

hi



how to nullify the 4th data set which is concatenated With out changing the proc.

thanks in advance.

Nithisha

[Nic Clouston]

//STEP.DDNAME DD
// DD
// DD
// DD DUMMY

If you have a fifth then you have to put it int he fourth position (instead of DUMMY) and then DUMMY the fifth, etc etc for 6th 7th etc

It's probably all in the manual but is you cannot be bothered to look then why should I - so you will just have to hope that what I put is correct
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Utility and Program control cards are NOT, repeat NOT, JCL.

[kolusu]

Nic Clouston,

You are right about the syntax. However once you coded dummy the system will not read the 5th ,6th,... dsn's any more

Kolusu
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Kolusu
www.linkedin.com/in/kolusu

[Nic Clouston]

Which is why I said you have to replace the DUMMY with the 5th DSN etc and DUMMY the last i.e. shift everything up - but not so succinctly - but that is what the manual is for - I believe there is an example in there but I have not read that part of the manual for 20 odd years!
_________________
Utility and Program control cards are NOT, repeat NOT, JCL.

[Nic Clouston]

However, I have just done a quick trawl through the JCL Reference and User Guide doing a search on DUMMY and came up with zero examples of dummying a concatenation - if this is the case then this is a shortcoming in the manuals. So the answer is:
If there are 4 datasets in your concatenation then this works to dummy the 4th:

[dz]

Would coding DSN=NULLFILE for any of targeted DDs allow to essentially DUMMY
out the DD AND allow any subsequent DDs to be processed?

[superk]

I was wondering the same thing. Sounds like it might be worth testing.

[kolusu]

[Nic Clouston]

Darn - I just ran a test to prove it, too
_________________
Utility and Program control cards are NOT, repeat NOT, JCL.