mmm internal error detected during message processing. system function=aa...aa, reason code=bb...bb, process name=cc...cc

mmm: MCF identifier or NET identifier

aa...aa: Maintenance information (issued system call or C library)

bb...bb: Maintenance information (OS error number or return value from C library)

cc...cc: Maintenance information (issuing function name)

S: Terminates processing.

O: Contact the maintenance personnel.