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Specifies the name of the library from which ZDT/Db2 is to load the ZDT/Db2 options module - usually HFM2POPT. Note that the member keyword can be used to specify an alternative name to HFM2POPT, if required.

If the DSNAME keyword is specified, ZDT/Db2 bypasses the usual library search when loading the ZDT/Db2 options module and only searches the specified library for the module.

When the DSNAME keyword is omitted, ZDT/Db2 searches load libraries allocated to the user's session in the normal order, for example, LIBDEF, ISPLLIB, STEPLIB, JOBLIB, link list.

One use of this option is in an environment with stringent security requirements, where it is necessary to ensure that all ZDT/Db2 users access a particular ZDT/Db2 options module, and that the use of this option module cannot be avoided.

The DSNAME keyword is optional.