SS$_NORMAL Positive answer. LIB$_NEGANS Negative answer. UTIL$_QUIPRO Quit processing. UTIL$_QUICONACT Continue processing, but cease prompting. LIB$_INVARG Invalid argument list (no prompt strings). SS$_ACCVIO Access violation (on user routine address). Any unsuccessful return from RMS, SYS$ASSIGN, $QIOW, or from the user-supplied routine (other than RMS$_EOF).