Thanks for the info, but I think I'll wait until I have the wraps on my current project before I install SP4 anyway. I have noticed a recurring theme of video card and HP printer drivers causing problems with VFP. Usually fixed with the lastest update for the video card but by droping the HP printer drivers back to version II of III (instead of a IV or V). I think their may even be some MS knowledge base articles on this.

>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.
>
>>>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.