Question about Canon CanoScan D646U Flatbed Scanner

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Cano Scanner D646U Twain driver

Okay, When i try to install my software/driver for my scanner it says, must install twain driver, which i dont have. can someone help?

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I need to download the TWAIN driver for the Cano Scan N1240U can you help?


http://software.canon-europe.com/products/0000469.asp (twain driver is emdedded with scangear)

pls. vote so I continue to share

Nov 09, 2010 | Canon CanoScan N1240U Flatbed Scanner

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Keeps saying "scanner failure" What do I do?


Scanners are a real legacy issue within windows - they have been there forever and yet the software controlling them hasn't been improved on - TWAIN it is the name of the Toolkit which communicates with your scanner and the proprietary software sits on top of that. TWAIN stands for "Toolkit Without An Interesting Name" - I think says it all. It hasn't been improved on much through the various releases of Windows. But to help you more we would need a lot more information.

- Platform Windows 7 .... Mac ...
- Scanner name and manufacturer
- Type of connection to the scanner ( USB ¦ WIRELESS )
- Whether you have had the scanner working in the past on this machine.
- Does the scanner work on another machine - Do you have another machine on which to try the scanner.
- Do you have the original disks for the scanner. And the original Windows Disk - so that you can load up the TWAIN software.
- How did you install the software for the scanner
- Have you come across this TWAIN driver ( perhaps you haven't installed that - because the Manufacturer's software doesn't include the TWAIN driver ( you have to load that from your Windows disk )

If you haven't loaded the TWAIN software - then perhaps - you should de-install the Manufacturers software and then install the TWAIN driver from the disk ( although - it may already be resident in the bowls of the Windows environment on the machine ) and then finally re-install the Manufacturer's software ...

So more questions than answers - but I hope that helps ....

Greg McC

Jul 02, 2010 | HP PSC 750 All-In-One InkJet Printer

3 Answers

I have installed the UE 404090, but cannot scan to my PC. It says no twain compliant found. If I press scan/file on the machine it says select destination _ what can I do there?


Hi,

Have you at some point installed a second scanning device on the system..

Reason being TWAIN is configured slightly different by every manufacturer to optomise the working of their hardware.

It some cases when you install a TWAIN device for Scanner A this can interfere with Scanner B
Usually its because your trying to use TWAIN(scanner A) on Scanner B

Make sense?

Make sure (if you have installed another scanner device) that you are using the TWAIN software that came with .

You might need to reinstall the entire set up from beginning.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Aug 06, 2009 | Panasonic PanaFax UF-8000 Laser Fax

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Canoscan Setup Utility CD-ROM missing


Go to there web site and download the drivers.
http://www.driversupdated.com/exact/canon.php?kw=CanoScan+
This will take you there should fix your problem let me know.
good luck

Mar 15, 2009 | Canon CanoScan FB636U Flatbed Scanner

3 Answers

I have a Canon scanner 5000f. All of a sudden the computer won't recognize it and says it is "unable to select Twain Source." What do I do?


First you need to follow the instructions for installing the scanner. It is important whether you connect the scanner before the software is installed and whether you work from the new hardware found box or just install the driver as software. It sometimes varies between operating systems as well.

Sometimes the twain files can become corrupted. Since other devices like digital cameras use the twain files they aren’t erased with a driver uninstall or overwritten with an install. If the twain files are gone the driver install will also install them.

Uninstall ScanGear (I think that is the Canon driver software) and remove the scanner if it is still showing in device manager and control panel under scanners. Unplug the USB.
Do a search for twain and delete all you find in the Windows folder. There is probably a folder and several files – delete them all. Do not remove any twain files not in the Windows folder.
Dig out the instructions and reinstall the scanner exactly according to them.

Jan 14, 2009 | Office Equipment & Supplies

1 Answer

Scanner problem


Check to see if you have the directory c:\windows\twain_32 with subfolder for your scanner.

Also check that you have the twain drivers in c:\windows\system32

Sep 16, 2008 | Canon CanoScan D646U Flatbed Scanner

1 Answer

Twain error on cannon scan D646U on VISTA


The D646U is not compatible with Windows Vista. Call Canon and inquire about their Customer Loyalty Program. They let you upgrade to a more current scanner at a reduced price.

800-828-4040

Jul 01, 2008 | Canon CanoScan D646U Flatbed Scanner

1 Answer

Installing my canon scanner


What part of the world are you located in?

Apr 28, 2008 | Canon CanoScan D646U Flatbed Scanner

3 Answers

Downloading software (Twain??)


The download website for your scanner is here:

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=351&modelid=8008

A TWAIN driver is simply a generic scanner software driver that your specific Canon software can hook into and use.

I recommend starting with this one and see if it installs the TWAIN driver you need:

"CanoScan Toolbox v2.2.3 for Windows 98/Me/2000/XP"


Nov 18, 2007 | Canon CanoScan N656U Flatbed Scanner

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