Thanks, Ed. I guess I'll start looking at all of the background stuff that's being loaded and see if something there is causing the problem.

Randy

>>Donny,
>>
>>Yes, we were having the same problems before we installed SP4. I hadn't heard of anyone having problems with VFP running under NT workstation, but I wanted to ask before I called M$ and spent two hours on the phone with them. Thanks.
>
>I've been running SP4 for a number of weeks now on my machines here and at the office; aside from some problems installing it (mostly caused by video cards, and fixable by switching to the standard VGA driver temporarily to install SP4), and an apparent problem with Diskeeper 4 (an NTFS defragmentation utility) and the latest Adaptec driver for their 7895/7990 chipsets, it seems to have fixed much more than it has broken. I'm using SP4 for development under VFP5 and 6 at this point.
>
>>
>>>>We are experiencing problems with Illegal Operation errors on several of our PCs use NT Workstation 4.0 w/SP4 and VFP 5.0a w/SP3. They seem to occur randomly, sometimes in design mode, sometimes while running an application. Any suggestions on what might be the cause?
>>>>
>>>>TIA
>>>>
>>>>Randy
>>>
>>>Randy
>>>
>>>I've been running NT Workstation w/SP3 and VFP 5.0a w/SP3 for wuite some time with no major problems, were you having trouble before upgrading your NT to SP4? I just got SP4 and now wonder if I should install it.