Canon 8400F scanner not recognized by 10.5.7 on G5 Powermac

I got my 9950F with the same issue to work by opening up Image Capture and then going to Devices and hit Browse Devices, then selected the scanner in the list and clicked on the Use TWAIN UI button.

The scanner then scanned and then I opened up the CanonScan software and waa-laa it works like a charm.

try it maybe it will work for you?

Lately I have been getting the same error message as the one discussed here when I tried to use the CanoScan LiDE 200.../CanonPI CS-U 3.8 Import plug-in with Photoshop 7 on the older of my two laptops (running OSX 10.4.11 because it does not have an Intel chip). By lately, I mean that the combo of Photoshop 7 and the CanoScan/CanonPI plug-in have worked just fine together for some years and I cannot figure out what change might have disrupted the harmony.

The scanner, BTW, is a CanoScan N1220U. I've used the Profiler to check that both USB ports are up and running. The scanner still operates well, if slowly, with the CanoScan Toolbox in the OS 9 environment, which I still have on this laptop.

Suspecting that the Photoshop plug-in had become corrupt, I reloaded and re-installed that, but the error message persists. I've tried all the ideas recommended in the discussion above, but none of them gets rid of the error message.

Any more ideas?

Before anyone tells me to upgrade, I also have a Intel Dual-Core MacBook Pro running Leopard while I wait for the problems with Snow Leopard to be sorted. But I like having this older machine in the background doing other slow things like scanning while I get on with more urgent matters on the newer machine.