IBM-supplied default for MSTJCLxx
There is no default MSTJCLxx parmlib member. The default master JCL resides in the IBM-supplied MSTJCL00 module in SYS1.LINKLIB.
There is no default MSTJCLxx parmlib member. The default master JCL resides in the IBM-supplied MSTJCL00 module in SYS1.LINKLIB.