DFSMSrmm can issue several types of messages when a problem occurs. Other system components also issue messages that can help you diagnose a problem affecting DFSMSrmm. For example, if you encounter errors while opening a data set, you might see messages with the prefixes IEC or ICH, depending on the component detecting the error, as well as a DFSMSrmm message informing you that the open request failed.

See DFSMSrmm system and user completion codes for system completion codes and user completion codes issued during DFSMSrmm processing.