z/OS MVS JCL Reference
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Relationship to access methods

z/OS MVS JCL Reference

Use one of the following access methods with the DUMMY parameter:
  • Basic sequential access method (BSAM)
  • Virtual storage access method (VSAM)
  • Queued sequential access method (QSAM)
  • BDAM load mode (BSAM with MACRF=WL in the data control block)

If you use any other access method, the job is terminated.

Note: The ISAM/VSAM interface does not support the DUMMY parameter. For more information on the ISAM/VSAM interface, see z/OS DFSMS Using Data Sets.

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