jeffowen
Member
I have been using my CanoScan 4200F on my Windows 7 64bit PC for a few years now without a problem.
I tried a scan today and I keep getting the message to say TWAIN source not found, check connections and restart the toolbox.
Nothing has been changed since I last used it about week ago, all the power and USB connections are OK. The scanner light comes on when the copy button is pressed, so the scanner software is linked OK to the scanner itself.
I have tried downloading the latest software including the TWAIN driver from Canon but this is no better. The only thing I have not done yet is to uninstall and reinstall. I don't see why I should have to do this, but may have to.
The only thing I know that has happened is the Microsoft updates a few days ago.
I tried a scan today and I keep getting the message to say TWAIN source not found, check connections and restart the toolbox.
Nothing has been changed since I last used it about week ago, all the power and USB connections are OK. The scanner light comes on when the copy button is pressed, so the scanner software is linked OK to the scanner itself.
I have tried downloading the latest software including the TWAIN driver from Canon but this is no better. The only thing I have not done yet is to uninstall and reinstall. I don't see why I should have to do this, but may have to.
The only thing I know that has happened is the Microsoft updates a few days ago.