No, I have done some more research and the Service Pack version dosen't seem to interupt with VFP6... But after some more testing I have discoverd that when I start VFP6 for the first time I CAN edit .prg files with modify command. But after I have run my application and now tries to edit my .prg file VFP6 eats up my CPU-resource and causing the editing to run in slow motion...

What is happening when I run my application that makes VFP crazy?

/Mårten Törnquist

>I don't believe this problem. My system had SP3 for a long time. After installing SP4 was when I started to experience this problem.
>
>It could be some sort of hardware issue. I have a AMD K6 166 MHz processor.
>
>--Paul
>
>>My brother and I have almost the same configuration on our computers. But he installed Service Pack 3 before Service Pack 5 and he doesn't have this problem. Do Service Pack 3 put something in the computer so the problem don't occure?
>>
>>/Mårten Törnquist