Discard is not supported for objects within a CICSplex context.
Explanation
In CICSĀ® Configuration Manager, the DISCARD line action may only be
applied against objects residing in a CSD.
System action
The CICS Configuration Manager batch command interface run is
terminated.
User response
Ensure that DISCARD is issued against the correct
CICS Configuration or remove the DISCARD command.
Then resubmit the job.