Using MPFLSTxx, you can specify MVS™ command installation exits to modify commands that an operator can issue at a console. You can authorize a console to use a specific command or commands, reject the command, direct the command to specific consoles for display, modify the command text, or execute the command in the exit.

If you code USEREXIT but do not supply an exit name, the system issues a syntax error message.

See z/OS MVS Installation Exits for a detailed description of the command installation exit and a sample exit.