Return codes and reason codes
Read the contained reference information that describes the return codes and reason codes reported at the conclusion of verb processing.
Reason code numbers narrow down the meaning of a return code. All reason code numbers are unique and associated with a single return code. Generally, you can base your application program design on the return codes.
Each verb supplies a return code and a reason code in the variables identified by the return_code and reason_code parameters. See Parameters common to all verbs.