SS$_NORMAL         Normal successful completion.
    LIB$_BADBLOADR     Bad block address.
    LIB$_BADBLOSIZ     Bad block size.
    LIB$_INSVIRMEM     Insufficient virtual memory.
    RMS$_DNF           Directory not found.
    RMS$_DNR           Device not ready or not mounted.
    RMS$_WCC           Invalid wildcard context (WCC) value.