6012   Invalid Key Length

   Problem:   The key length of the stored index and the actual length when
   evaluating the key expression were different.

   Solution:  Make sure the key expression will produce a value of the same
   length for all records.  Do not use functions such as TRIM() in the key
   expression.  To restrict the length of the key values, use the LEFT() or
   PADR() functions.  If a User-Defined Function (UDF) is used in the key
   expression, 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.