z/OS MVS JCL Reference
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Cautions when coding the RESTART parameter

z/OS MVS JCL Reference

Before resubmitting a job:
  • Check all backward references to steps before the restart step. Eliminate all backward references in EXEC statement PGM parameters and DD statement VOLUME=REF parameters.
  • Review all EXEC statement COND parameters. If any of the COND parameters reference a step before the restart step, be aware that the system ignores the return code tests for those steps. See Considerations when using the COND parameter for more information.
  • Note that the stepname and procstepname specified to identify the restart step must be unique within the job. Otherwise, the system will not be able to determine the correct restart step. Results will be unpredictable.
  • Review all IF/THEN/ELSE/ENDIF structures. If a relational expression references a step that is bypassed by the RESTART keyword, the system evaluates that part of the expression as false.

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