The error handler you are seeing is the VFP one for some errors like the one you are hitting is what happens on internal errors that aren't something wrong with the command itself.

I have no idea what else to tell you. Copy the dbf/cdx and one by one delete the tags until the problem goes away and see which one is giving you the error.

Can you post the output of the debugout code from yesterday, one of us may be able to see something you are overlooking.

>not conciously - or detectably! I've previously inserted 'ON ERROR' immediately prior to the problem to ensure that no error handling is on. When the program is suspended on the line before the problem, ON("ERROR") shows no error handler is in effect.