Tape Cartridge Message Display Installation Exit (IGXMSGEX)

You can use the message display installation exit to:

Customize messages for display on an IBM® 3480, 3490, or 3590 tape drive by modifying the message text pointed to by the parameter list, based on job name, step name, or some other means. The message text includes the parameters from the MSGDISP macro. The system issues the MSGDISP macro for system-managed drives the same as it does for non-managed drives.
Specify no automatic cartridge loading.

If you plan to use DFSMSrmm, you must use the IGXMSGEX exit routine it provides. If you have already written your own IGXMSGEX routine, you might have to merge it with the source code provided by DFSMSrmm. See z/OS V2R1.0 DFSMSrmm Implementation and Customization Guide for more information.