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LBR Routines, LBR$SEARCH, Condition Values Returned
 *Conan The Librarian 

    LBR$_ILLCTL        Specified library control index not valid.
    LBR$_ILLIDXNUM     Specified library index number not valid.
    LBR$_KEYNOTFND     Library routine did not find any keys with the
                       specified RFA.
    LBR$_LIBNOTOPN     Specified library not open.
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