Thanks Warren, with your suggest I'm tryng to discover what happens in the software. I think that there are some error in the use of Date. Before this test I was thinked that the problem was when I maximized the form but after have launched my software under terminal I've seen in the terminal the error that cause the crash. The error is it: VARIANT_FormatDate Unknown token 0x23 Have you some suggest to me? Thanks Panthe