Many DFSMShsm error conditions generate nonzero return codes and reason codes. The return code usually identifies the error; the reason code provides additional detailed information about the problem.

When an error is reported in a DFSMShsm message, the return code is used to select the appropriate message. The return code is often used as part of the message identification number. For example, a return code of 5 can result in message ARCnn05I, where nn is a variable depending on the function performed. (For recall and recovery, nn is 11; for migration, nn is 12; for backup, nn is 13; for command processing, nn is 16; and for ABARS processing, nn is 60 or 61.) Each message explanation includes a description of any reason codes that may be associated with the message. For an explanation of each message, see z/OS MVS System Messages, Vol 2 (ARC-ASA).