Thanks David. That was indeed the problem. From your reply, I'd say this situation had stung you too:)

I can see how another verison of the form got copied into another folder by accident and caused my nightmare. Its a problem that I have with XP when I drag and drop files in Explorer. If I select a lot of files and drag them to a target folder, the latter is sometimes difficult to see because the transparent effect doesn't always indicate to me where they are going to be dropped. To make things worse, I do the drag and drop from my floppy drive (yes this is an ancient method of backup isn't it) and its a bit slower to react to all the XP GUI stuff.

Mike

>Mike,
>
>I'll bet that your main.prg is running another form that it's finding along a path that is different from the path you have in your dev environment.
>
>>I'm using VFP7SP1 (with WindowsXP). I open my VFP project to modify a form. In the form load event I place a SET STEP ON. If I run the form directly by selecting the Run command button from the project manager or from the command window or from the right-click popup menu, it steps as expected. However, if I run my main project PRG that calls the form, it ignores the step command and all other changes that I've added. I don't really know when this problem started. I'd simply changed some of the form's code and when it didn't do as I expected, I added the step on to trace thru the problem. Well it simply refuses to step into the code when called from my main program.