Procedure for SYSABEND, SYSMDUMP, or SYSUDUMP

Depending on the JCL used, the system directs a dump to the SYSUDUMP, SYSABEND, or SYSMDUMP data set. If the system did not produce a dump, you might need to recreate the failure and obtain one. For information about obtaining a dump, see z/OS MVS Diagnosis: Tools and Service Aids.

SYSUDUMP data sets usually do not contain enough information to be useful in diagnosing a failure.

Obtain a system storage dump that contains the user's program.
Determine the system abend code by using either of the following sources:
- The job-related information about the abend in the job log.
  This information includes the abend code, PSW contents, and general-purpose register contents. The abend code is 3 characters long. To obtain the job log, you must specify the JCL parameter MSGLEVEL=(1,1) on your JCL JOB card.
- The system storage dump.
  - Locate the formatted section at the beginning of the dump. Determine the abending job by locating the job whose abend code field (TCBCMP at TCB + X'11') contains a nonzero value.
  - The field is only 3 characters long. Ignore the first (left-most) byte. If the abend code appears in the first 12 bits following the first byte, it is a system abend code. If it appears in the next 12 bits, it is a user abend code and the value must be converted to decimal.
When you determine the ABEND CODE, continue with Procedure for building the abend keyword.