While testing your exit, you might need a dump to debug or to examine data areas to determine where to look for information your exit requires. For general information on using dumps, refer to z/OS V2R1.0 MVS Diagnosis: Tools and Service Aids . For information on analyzing dumps, refer to z/OS V2R1.0 MVS Diagnosis: Reference . For information on requesting and reading dumps, refer to z/OS Problem Management. The items in this topic contain useful advice for calling dumps.