Change use attribute installation exit (CBRUXCUA) return codes

The following are the return codes that can be passed back from the CBRUXCUA exit:

Code: Meaning
0: Change the use attribute of the volume specified as requested. No changes have been made to the parameter list (CBRUXCPL). Use what existed at the time the installation exit was called.
4: Change the use attribute of the volume specified and note that one or more fields in the parameter list (CBRUXCPL) have changed.
8: Do not change the use attribute of the volume specified.
Note: If the installation does not allow the use attribute of a volume to be changed from SCRATCH to PRIVATE, the job may fail for the volume required.
12: Reserved.
16: Do not call the change use attribute installation exit again. Change the use attribute of the volume as requested using the existing volume record information.

Note: If the installation has returned return code 16 indicating that the exit should not be called again, the exit can be reactivated either by stopping and restarting OAM or issuing the LIBRARY RESET,CBRUXCUA command. If the exit abnormally terminates, passes back an invalid return code, or passes back invalid data, PRIVATE to SCRATCH change use attribute processing is discontinued until one of the above actions has been taken. This is intended to protect user data from being inadvertently scratched.