JES2 issues message $HASP479 when another member is probably holding the JES2 checkpoint lock or when

1. A cold start is in progress with a new checkpoint data set
2. An all-member warm start is in progress
3. An all-member warm start is being performed using the CKPTn option to restart JES.

Ensure that for the system identified, JES2 and MVS™ are inoperative before responding to the $HASP454 message. Entering the $D MEMBER command for all members of a multi-access spool identifies the member that has the checkpoint lock. You can then reset the jobs on the failed member to be available to other members by issuing the $E MEMBER command.