>>Do you use anywhere LASTKEY()? Or other functions to test the keyboard input?
>>
>>Vlad
>
>No, i don't use LASTKEY() or other functions that test the keyboard input.
>This thing has driven me nuts. The form behave incorrectly when I ran
>it, but I can't use the tracer to trap the error because the form
>behave correctly when run through the tracer.

Try the old fashion way of using Wait Windows to determine where the problem is located. Are U using the KeyPress event also?