>If it's the one that appears in a WAIT WINDOW, try SET NOTIFY OFF
>
>>Hi everybody,
>>
>>If I don't want to define my structural changes through DD is there a way to prevent Invalid Input message (and the only way out is to kill VFP)?
>>
>>I've checked the User Guide briefly, but I don't see a way out.
>>
>>Thanks in advance.

Unfortunately, it is something worse than that. I decided to re-do the form instead.