DBFCDX/612   Invalid key length

     Explanation:  This error is caused when the stored index key length
     and the actual length, when evaluated, are of different lengths.

     Action:  Some suggestions to resolve the problem are:

     1. Basically, make sure that the key expression will produce a value of
        the same length for all records.

     2. Avoid using functions like TRIM() in the key expression.  If you need
        to restrict the length of key values, use functions like LEFT() or
        PADR().

     3. If you are using a user-defined function (UDF), make sure that the
        same function is available in all applications that use the index,
        and that the function returns a value of the same length for all
        records.