Steven,

>We are using a VFP backend via an ODBC connection to a cold fusion front end. We are having a problem writing numbers back to the VFP database. We get an 'data type mismatch' error. Any ideas??

I'm not conversant with Cold Fusion, but in general... input values that are POSTED from a web page or sent in the URL (querystring) are sent as character strings. You might have to convert them with VAL() before updating the database.