>tabback is not created. It just does nothing
>changing destin to tabback without a drive doesn't create a zip file either.
>
>I'll try your suggestion as a prg then compile it as an exe.
>
>Thanks

If there's any question about whether WinZip® is actually being run or not, then another thing to try would be to use WSH instead of API_AppRun and see if that makes a difference (assuming of course the WSH is installed on your machine). To do this simply call o.SetRunType(2) before calling o.AddFiles().