The sequence for replacing each DFSMShsm exit presented in this topic is always the same:

1. Issue the SETSYS EXITOFF command to deactivate the active exit.
2. Link-edit the replacement exit code into the proper library in the LNKLST concatenation (job or step libraries).
3. Refresh the library lookaside (LLA).
4. Issue the SETSYS EXITON command to activate the replacement exit.