>Daniel:
>
>I'm afraid I haven't been able to pin this error down, except that it is definitely related to PhDbase. We don't use "private data sessions". In fact, this application is a legacy that was originally written in FoxPro/DOS. It has not been rewritten, just re-compiled. Also, the tables are in 2.x format. I wonder if that might have something to do with it. Hmmmm...
>
>Thanks.
>
>-jd

I'll bet it does. The cases I've run into with C5 errors in the past year have always been due to bad data or a corrupted index.