Walter
**Every** time i have a C5 i click on "Send to Microsot" button. You won't believe how helpful this can turn out for them to track it.

Jaime

>Hi Aleksey
>
>Occurring both in VFP8SP1 and VFP9SP1, Windows XP SP2 and Windows 2003 server.
>
>I've got a problem when my application generates a C5 at random. It seems to be related to starting and or refreshing a form. The C5 occurs on the DO FORM statement or a refresh event.
>
>It occurs on various forms. Some are complex others are less so. It is very random and could occur soon after starting the application fresh, without even having reaching the READ EVENTS.
>
>The C5 occurs in some 1 - 5% of the cases.
>
>It seems to occur on different machines, with different hardware and display drivers. Some C5s occur on a Refresh event of the form, so I suspect the C5 is a result in the VFPs internal routines for displaying and/or refreshing the form.
>
>Could it have to do with the classlibraries associated with those forms. It seems that as soon as a form has been loaded and show correctly, the C5 does not occur for the rest of the session. Could it have to do something with dirty internal buffers (used for classes?)
>
>I wish I could replicate the issue, but since this project is large and the frequency of the problem is low, it seems a mission impossible.
>
>Do you know of anything that could cause this? Has it been reported before ? If so, is there a workarround? If not, can I do something when the error occurs (memory dump or so) to help you track the problem ?
>
>Thanks in advance...
>
>Walter,