Answer Posted / premkumar

Since it is concatenated, you can't have DD names as
mentioned in the previous responses. suppose your 4 dd
statements inside a proc are as below

//myproc PROC
//STEP01 EXEC PGM=progname
//DD01 DD DSN=userid.base.file1
// DD DSN=userid.base.file2
// DD DSN=userid.base.file3
// DD DSN=userid.base.file4
//*

Now you can override the 3 dd statements in JCL as
//POCNAME1 myproc
//STEP01.DD01 DD DSN=userid.base.file5
// DD DSN=userid.base.file6
// DD DSN=userid.base.file7

Note: the fourth file has been left as it is because the
questionsis to override only the first 3 statments.

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