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BACKUP_API, BACKUP$START, Condition Values Returned
 *Conan The Librarian 

    SS$_NORMAL         Normal successful completion.
    BACKUP$_BADOPTDSC  Invalid callable interface option descriptor.
    BACKUP$_BADOPTTYP  Invalid callable interface option type.
    BACKUP$_BADOPTVAL  Invalid callable interface option value.
    BACKUP$_           Invalid callable interface option value.
    BADOPTVALQ
    BACKUP$_DUPOPT     Previously specified callable interface option
                       type invalid.
    BACKUP$_NOAPIARGS  Callable interface required parameter not
                       specified or invalid.

    Any condition value returned by the OpenVMS Backup utility.
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