Take the following steps to specify an alternate version of the
master JCL in a MSTJCLxx load module in SYS1.LINKLIB:
- Code the master JCL in the alternate data set. Assemble the data
set. Then link-edit the data set as a module in SYS1.LINKLIB (or a
library concatenated to SYS1.LINKLIB, using a LNKLSTxx or PROGxx member
of of the parmlib concatenation).
- Code the MSTRJCL=xx system parameter in the IEASYSxx parmlib member
or in response to the SPECIFY SYSTEM PARAMETERS prompt. (See IEASYSxx (system parameter list) for the syntax of the MSTRJCL=xx
system parameter.)
- Ensure that SYS1.PARMLIB does not contain a MSTJCLxx member that
matches the suffix specified on the MSTRJCL=xx system parameter. (If
such a member exists, the system uses the master JCL in that member,
and does not process the master JCL in the MSTJCLxx load module.)