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Specifies the name of the DOPT ACBLIB data set into which ZDT/IMS dynamically builds PSBs. This parameter is used by functions that use dynamic PSBs to access databases in BMP mode.

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

The user cannot override the value you specify for this parameter.