>>Unfortunately I get an error on the STORE VAL() line.
>
>ERROR(),MESSAGE() ?
>
>Fabio

Oops.... I get a 'Data type mismatch' error.

MS Help says "Data type mismatch (Error 9). An expression is invalid because it is composed of data types that Visual FoxPro cannot evaluate together. You have either specified an inappropriate data type, or the two fields specified in an operation between two tables (such as UPDATE, REPLACE, SET RELATION) did not have the same data type. "