the debugger detected an error when trying to fetch the main window
 from the Digital Resource Manager (DRM).

    Facility: DEBUG, VMS Debugger

    Explanation: The debugger detected an error when trying to fetch
    debuggers main window from the Digital Resource Manager (DRM).
    This prevents the debugger from continuing this session.

    User Action: Try the debugger again, if the same results exist
    submit a Software Performance Report (SPR).