VMS Help  —  DCX Routines, DCX$COMPRESS_DATA, Condition Values Returned
    DCX$_INVCTX        Error. The context variable is invalid, or the
                       context area is invalid or corrupted. This may
                       be caused by a failure to call the appropriate
                       routine to initialize the context variable or
                       by an application program error.
    DCX$_INVDATA       Error. You specified the item value DCX$C_
                       BOUNDED in the DCX$ANALYZE_INIT routine and
                       attempted to compress a data record (using
                       DCX$COMPRESS_DATA) that was not presented for
                       analysis (using DCX$ANALYZE_DATA). Specifying
                       the DCX$C_BOUNDED item value means that you
                       must analyze all data records that are to be
                       compressed.
    DCX$_INVMAP        Error; invalid map. The map argument was not
                       specified correctly in the DCX$ANALYZE_INIT
                       routine or the context area is invalid.
    DCX$_NORMAL        Normal successful completion.
    DCX$_TRUNC         Error. The compressed data record has been
                       truncated because the out_rec descriptor did
                       not specify enough memory to accommodate the
                       record.

    This routine also returns any condition values returned by
    LIB$ANALYZE_SDESC_R2 and LIB$SCOPY_R_DX.
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