Andrus,

C5 is the replacement for Unhandled Exception. It basically means windows has detected a problem that prevents the application from continuing. It also means windows in unable to determine exactly what that problem is. Invalid Page fault is similar in that the application cannot continue, but in the case of this error windows knows what the nature of the problem is. Neither of these errors are caused by your code, they are cause by something choking VFP somehow. VFP maybe able to report the error and log it, but if VFP could HANDLE the error it would go "south" right afterwords.

As for verifying the problem does not occur in W2K, I would take Sergey's word for that.