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Suppose a proc step has a DD statement like
//ABC DD DSN=TEST.FILE1,DISP=SHR
DSN=TEST.FILE2,DISP=SHR
and the above DD name is overridden from the JCL as given
below
//procstepname.ABC DD DSN=TEST.FILE3 - Will the DD
statement now have just TEST.FILE3 or it will be TEST.FILE3
and TEST.FILE2?
Suppose if it is overridden twice like
//procstepname.ABC DD DSN=TEST.FILE3
//procstepname.ABC DD DSN=TEST.FILE4
Will this give a JCL error? If not, what will be final
output?

Answers were Sorted based on User's Feedback

Suppose a proc step has a DD statement like //ABC DD DSN=TEST.FILE1,DISP=SHR DSN=TEST.FIL..

Q1:
If you CODE below ovverride in JCL
//PROCSTEPNAME.ABC DD DSN=TEST.FILE3
it will ignore File1 & file2.
To use all three files, please give below override in JCL
//PROCSTEPNAME.ABC DD
// DD
// DD DSN=TEST.FILE3

Q2:Giving two ovverrides for same DD, will it give JCL
error.
No, Job will end with RC=0 and use second override ingonred
first one.

 Is This Answer Correct ? 10 Yes 0 No

Suppose a proc step has a DD statement like //ABC DD DSN=TEST.FILE1,DISP=SHR DSN=TEST.FIL..

Question 1:
TEST.FILE3 and TEST.FILE2
Note:
If you just want TEST.FILE3 you must nullify the TEST.FILE1
and TEST.FILE2 concatenation as in:
//procstepname.ABC DD DSN=TEST.FILE3.DISP=SHR
// DD DSN=NULLFILE

Question 2:
TEST.FILE3 and TEST.FILE2, the second override will be
ignored

 Is This Answer Correct ? 2 Yes 5 No

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