The ARCRDEXT installation exit receives control in a JES3 environment at converter or interpreter time for jobs going through converter or interpreter setup. For other jobs in either a JES2 or JES3 environment, the ARCRDEXT exit receives control just before DFSMShsm recalls the data set. This exit is not used for recall to a specific volume.

When the ARCRDEXT exit receives control, it accesses a candidate list of volumes in the general pool or in a pool you designate. This list contains recall target volumes selected by the system. You can override the order of the candidate list of volumes and place your choices in the target volume choice list.

This exit is called only for non-system-managed data sets.