>We have a large VFP 8SP1 program that experiences random exits when running on two specific customer computers. The application simply disappears, no error messages, no Dr Watson, no "This application has performed an illegal operation and will be shut down" It just exits. There doesn't seem to be any rhyme or reason to where/when it exits. Sometimes it's just sitting on a data entry form, or sometimes the main menu.
>
>I can't find anything in the Windows system or application event logs about this.
>
>The application is a large compiled VFP 8 SP1 program complied to an EXE. It uses VFP native tables in a database. In the two cases where we have seen this problem, it is being run on a Windows 2003 Terminal Server. However, we run it ourselves on a 2003 Terminal Server and we don't see this problem.
>
>Observations:
>* We have noticed that on the two servers that have this problem, we have to use the BITMAP=OFF config setting for certain forms to display correctly. I don't know if this is connected to the shutdowns though. We had the shutdown problem on the servers BEFORE we included the BITMAP=OFF setting and the problem continued after we included the setting. I only include this information because we've never had display problems that required the BITMAP setting, except for these two servers that also have the shutdown problem.
>
>* We've also had a couple of "Fatal error: Exception code=C0000005" errors logged on one of the servers as well. However, they usually don't get the C0000005 eror, just a shutdown. FWIW, the two lines that we're logged with C0000005 errors are:
>
>lxRetVal = messagebox(tcMessage,lnButtons+lnFocus+lnIcon,tcTitle)
>and
>INKEY(1, "H")
>
>* We don't think it's data or table related since its happened at two completely different customer sites.
>
>Has anyone seen anything like this before? Any ideas?

- What's the Windows SP and update level on the problem servers?
- Has your own TS admin kept track of any config changes or tweaks to your own TS that might help out these others?
- Check that the servers are using WHQL-certified video drivers provided by Microsoft. If they are vendor-supplied drivers, ensure they are WHQL-certified. If not you can try getting WHQL-certified drivers from either the adapter maker (e.g. Asus) or chipset maker (reference driver, e.g. nVidia)

I believe there are quite a few TS config tweaks and hotfixes available to fix various issues. There's probably a site or MS search page somewhere that puts them all in one place but I don't know where that is.