The volume not in library installation exit (CBRUXVNL) receives control under a variety of circumstances and error conditions. The primary purpose of the exit is to give the installation the opportunity to enter a volume into a tape library during job step setup, device allocation, and library mount processing.
The volume not in library installation exit is supplied by DFSMSrmm. If your installation is not using DFSMSrmm, the supplied exit returns a return code of 16, indicating that the installation exit not be invoked again. For more information, see z/OS DFSMSrmm Managing and Using Removable Media, z/OS DFSMSrmm Implementation and Customization Guide, and z/OS DFSMSrmm Diagnosis Guide.
If your installation is not using DFSMSrmm and your tape management vendor has not supplied an exit, OAM provides a sample volume not in library installation exit (CBRSPUXV) in SAMPLIB that can be customized to fit your needs. The discussion that follows will assist in determining whether the exit is needed on your system. For more information on this SAMPLIB member, see SAMPLIB member CBRSPUXV.