>I have an old legacy system whose files are still in FP2.6 format and must stay that way until it is converted some day.
>
>My problem is that when working in VFP I forget what version I am in and inadvertantly open one of these files to modify the structure. The result is that it gets converted to VFP format.
>
>Does anybody know of a way to make it impossible to modify FP2.6 files from VFP? I keep on making the same stupid mistake.
>
>Thanks in advance.

You can easily restore format to FP2.x: COPY TO ... TYPE FOX2X