VMS Help MACRO, /MIGRATION, Qualifiers, /DEBUG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /DEBUG=(option[,...])
       /NODEBUG

    Includes or excludes local symbols in the symbol table or
    traceback information in the object module. You can specify one
    or more of the following options:

    Option      Description

    ALL         Makes local symbols and traceback information in
                the object module available to the debugger. This
                qualifier is equivalent to /ENABLE=(DEBUG,TRACEBACK).
    NONE        Makes local symbols and traceback information
                in the object module unavailable to the
                debugger. This qualifier is equivalent to
                /DISABLE=(DEBUG,TRACEBACK).
    SYMBOLS     Makes all local symbols in the object module
                available and all traceback information unavailable
                to the debugger. This qualifier is equivalent to
                /ENABLE=SYMBOLS.
    TRACEBACK   Makes traceback information in the object module
                available and local symbols unavailable to
                the debugger. This qualifier is equivalent to
                /ENABLE=TRACEBACK.

    The default value for /DEBUG is ALL. The /DEBUG
    qualifier overrides /ENABLE=(DEBUG,TRACEBACK) or
    /DISABLE=(DEBUG,TRACEBACK), regardless of their order on the
    command line.

                                   NOTE

       Debugging can be simplified by specifying /NOOPTIMIZE. This
       qualifier prevents the movement of generated code across
       source line boundaries.

    For more information about debugging, see the OpenVMS Debugger
    Manual.