IMO, any solution that involves calling external EXE is inherently unreliable.

>Hi Folks. Thanks for your replies
>After some searching, I have decided on 7-Zip
>For a few reasons:
>- It seems to work
>- It can be unzipped with Winzip
>- I could integrate it easily into my existing
> VFP routines with just a few changes
>- It is free
>- You can specify files (and Folders) to be excluded
>