Got error on T Thanks a lot from Copenhagen, Denmark Thanks for your instructions – got my Canon scanner working a treat! Can Cannon be any more bad at support? Thanks a lot for the trick. I was reinstalling my driver everytime i come across this problem. Worked perfectly on Windows7 bit with a Canoscan F.

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About software license agreement Before downloading the driver, make sure to download and read the following License Agreement.

Unfortunately, it didn’t work for me I am trying for canoscan twain again, the scanner works fine the first time canoscan twain the day that I am using it.

Canon disclaims all warranties, expressed or implied, including, without limitation, implied warranties of canoscan twain, fitness for a particular purpose and non-infringement.

How can I fix it?

Thanx for the tip! I’m not sure why this problem started all of a sudden. Why couldn’t Canon get that right? Is it caused canoscan twain Windows updates or new installations? Why Canon did not have this kind of information and let its customer setting in the dark?! Jeff Tried it several times double checked everything and still doesn’t work.


Pity they didn’t work, though. Windows 7 64 canoscwn Home Edition, IrfanView 4. Thanks for canoscan twain article. Export Administration Regulations “EAR”canoscan twain not to export or re-export, directly or indirectly, the Software in violation of such laws, restrictions and regulations, or without all necessary approvals.

Canoscan twain checked scanner operation each day since the previous “fix” and it worked well for 3 days, now it doesn’t. Canoscan twain bought it to replace a Lide60 which would not work in Windows 10 after the infamous Anniversary update.

Google definitely put the most helpful answer at top of list! Thank you, I can finally use my trusty old Lide 60 again, so very clear and helpful!! New 08 Canoscan twain 6. Thanks Canoscan twain, Like so many others I just wanted to add my thanks.

Jeff Widmer’s Blog – Canon Scanner – Unable to open TWAIN source

This is very confusing. Or why is it necessary to have it in the PATH variable in canoscan twain first place.


All I had to do after following the instructions was to restart the toolbox for my lide f. That fixed it for me canoscan twain Its still working perhaps it will continue. Running Toolbox as Administrator helped me. Jeff, Thanks for posting this article!

Canon Scanner – Unable to open TWAIN source

I do not remember being asked questions about what interface I wanted to use. Many thanks – Worked for me too. Must have been some canoscan twain configuration change or other service pack that mucked up Twain, but what do I know.

I think it might have to do with the new 5. Here’s what I managed to do: I’ve had my F about 2 canoscan twain today was canoscan twain first time I had ever run into this ‘twain’ problem. Checked the compatibility box and chose Windows XP.