Chances are thta this is a "permissions problem". Ie. You have set the task up to run when there is no user logged on, but failed to supply the appropriate user-id / password. .

But, it could also be a lack of a console, try system "cmd /c rsync --version";

In reply to Re^3: On win32 a scheduling task program doesn't work by BrowserUk
in thread On win32 a scheduling task program doesn't work by saintex

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