Library /sys$common/syshlp/helplib.hlb  —  LBR Routines, LBR$GET_HISTORY, Condition Values Returned
    LBR$_NORMAL        Normal exit from the routine.
    LBR$_EMPTYHIST     History empty. This is an informational code,
                       not an error code.
    LBR$_INTRNLERR     Internal Librarian routine error occurred.
    LBR$_NOHISTORY     No update history. This is an informational
                       code, not an error code.
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