no STEP, GO, SET PROCESS/VISIBLE or CALL commands allowed in screen
 displays

    Facility: DEBUG, VMS Debugger

    Explanation: A STEP, GO, SET PROCESS/VISIBLE or CALL command
    was used in a screen display command list. The debugger does not
    allow the use of such commands in display command lists.

    User Action: Re-specify the screen display command list without
    using any of the disallowed commands.