GLO2137A Specify volser for jobname, stepname, procstepname, ddname
or reply CANCEL -ssss.
Explanation
In support of the VOL_ADD_PROMPT keyword, specify
a volume serial number to extend the data set that is associated with
the job jobname, the step stepname,
the procedure stepname procstepname, and the DDNAME ddname for
subsystem ssss.
User response
Specify a six character volume serial number to use
to extend the data set, or reply with the CANCEL command
to fail the allocation.