z/OS MVS JCL Reference
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//*MAIN statement

z/OS MVS JCL Reference

Purpose: Use the //*MAIN statement to define the processor requirements for the current job. Many of the parameters are used to override parameters on the JES3 STANDARDS initialization statement.

Note: If any parameter is misspelled or contains an invalid value, JES3 writes the following to the JESMSG data set: the //*MAIN statement, the relative error position on the statement, and an error message. Then JES3 abnormally terminates the job.

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