>>>You can trap any error
>>>ON ERROR DO processerror()
>>>and replace it with custom on, but in most cases you can just remove the source of error, e.g.
>>>IF USED("mytable")
>>>Select mytable
>>>Endif
>>
>>An error handler doesn't stop the rather annoying behavior of presenting the user with an open table dialog when a line or SQL statement references an alias that is not open. The only way I know of to do this is just make darn sure your tables are opened before running the line.
>
>Not necessarily. If you run Select against tables in default directory Fox will open them itself.

My point was that an error handler won't catch this. True, VFP will open the tables if they are in the path or the default directory, but in development/ testing, they aren't always.