SS$_NORMAL         Normal successful completion.
    CONV$_BADBLK       Invalid option block.
    CONV$_CONFQUAL     Conflicting qualifiers.
    CONV$_INSVIRMEM    Insufficient virtual memory.
    CONV$_NARG         Wrong number of arguments.
    CONV$_OPENEXC      Error opening exception file file
                       specification.
    CONV$_ORDER        Routine called out of order.