/EXECUTE_ONLY
       /NOEXECUTE_ONLY (default)

    The /EXECUTE_ONLY qualifier is meaningful only to main programs.
    It allows the image to activate shareable images to which the
    user has execute access but no read access. All shareable images
    referenced by the program must be installed, and OpenVMS RMS
    uses trusted logical names, those created for use in executive or
    kernel mode.

    You cannot specify this qualifier for an executable image linked
    with the /TRACEBACK qualifier.