Walter,

Actually I have just the same code in my program :
EXPORT TO &cFileName TYPE &cFormat
where cFileName and cFormat(=XL5) previously defined in a table.

The code works for most users except for one. It seemed that the user has a different Excel driver (probably an ODBC driver or something) than that of most users. Would this cause an error at all?

I've checked their Excel versions and they are all Excel 97.

I appreciate all the help. Again, thanks.