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

    LBR$_DUPKEY        Index already contains the specified key.
    LBR$_ILLCTL        Specified library control index not valid.
    LBR$_INVRFA        Specified RFA does not point to valid data.
    LBR$_LIBNOTOPN     Specified library not open.
    LBR$_UPDURTRAV     LBR$INSERT_KEY is called by the user-defined
                       routine specified in LBR$SEARCH or LBR$GET_
                       INDEX.
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