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Specifies the staging ACBLIB data set name. This parameter is used by the Initialize function when a Fast Path database is specified.

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™.ACBLIB.

If you do not want the user to override the value you specify for this parameter, set UACBLIB=N.