The ABARS exits are unlike the other DFSMShsm exits because they are not dynamically loaded and unloaded when the SETSYS EXITON and SETSYS EXITOFF commands are specified. Instead, ABARS exits are loaded when the ABARS secondary address space is initialized if the SETSYS EXITON command has been specified.

To replace an ABARS exit:

1. Link-edit the new version of the exit and place it in the appropriate link library.
2. Issue the F LLA,REFRESH command.
3. Issue the SETSYS EXITON command for the ABARS exit you want to call during ABARS processing.
4. Issue the ABARS ABACKUP or ARECOVER command.

The new exit will be loaded and called by ABARS processing.

When the SETSYS EXITOFF command is issued for an exit that is active, the exit is no longer called, but it is not unloaded. When the SETSYS EXITON command is specified for an exit that is not active, the exit is not loaded or called until an ABARS command causes a secondary address space to be initialized.