This appendix lists the return codes and reason codes associated with checkpoint/restart functions and describes the status conditions and error messages that may be encountered during normal operation. For more detailed information see the IHJxxxx messages in z/OS MVS System Messages, Vol 1 (ABA-AOM), z/OS MVS System Messages, Vol 2 (ARC-ASA), z/OS MVS System Messages, Vol 3 (ASB-BPX), z/OS MVS System Messages, Vol 4 (CBD-DMO), z/OS MVS System Messages, Vol 5 (EDG-GFS), z/OS MVS System Messages, Vol 6 (GOS-IEA), z/OS MVS System Messages, Vol 7 (IEB-IEE), z/OS MVS System Messages, Vol 8 (IEF-IGD), z/OS MVS System Messages, Vol 9 (IGF-IWM), and z/OS MVS System Messages, Vol 10 (IXC-IZP).