z/OS MVS JCL Reference
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Relationship to other control statements

z/OS MVS JCL Reference
SA23-1385-00

  • Do not refer to a DD DYNAM statement in a DDNAME parameter.
  • To nullify the DYNAM parameter on a DD statement in a cataloged or in-stream procedure, code a SYSOUT or DSNAME parameter in the overriding DD statement. DSNAME=NULLFILE does not nullify a DYNAM parameter.
  • Do not code a backward reference to a DD DYNAM statement.
  • Do not code the DYNAM parameter on the first DD statement for a concatenation.
Parent topic: DYNAM parameter

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