Hi Ed,
Thanks for the input. The name of the cdx file matches the name of the .dbf (as it should) and the file extension is not required in the parameter. Sergey got me pointed the right direction though, so I'm ok now.

>You need the name of the cdx file not the alias in TAGCOUNT("indexfile.cdx") or TAGCOUNT() by itself for the currently selected table.
>
>Ed