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Specifies whether the user can override the name pattern that is specified in the LOGDSN parameter.
The user can override the LOGDSN parameter.
The user cannot override the LOGDSN parameter.

If you specify ULOGDSN=N:

  • The IMS log Data set name pattern field on the DLI Mode Data Sets 2 panel is protected.
  • LOGDSN= statements in the HFMIMSIN input of batch jobs are ignored.
  • No LOGDSN= statements are included in the JCL generated by ZDT/IMS dialogs.

This parameter is optional. If it is not specified on the HFM1POPI macro statement, ZDT/IMS uses either the value that is specified on the HFM1POPD macro statement (if specified on that statement), or Y (otherwise).