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"Unable to open TWAIN server" Please assist

I have a problem saying "Unable to open TWAIN server". How
can I get this resolved? Im' on XP system. I was given an old scanner (Canoscan N670U) by someone who upgraded and loaded the software on my computer but the scanner won't work.

I get the message "Unable to open TWAIN Server". I am a complete computer illiterate. What in heck is a TWAIN Server and what do I have to do to get it to work ?

I should mention that my computer has the Vista operating system.

I googled Twain Server and downloaded a program called Driver Detective which scanned my system and told me everything was OK.

I am about two minutes away from sending it to the dump.

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  • 2 more comments 
  • billkeys2 Dec 27, 2008

    cannot find twain server

  • Yevgeny Raytman
    Yevgeny Raytman Jan 23, 2009

    I've been written: Unable to open TWAIN sourse (Code:201).
    And Also :
    Please forward the following information to Technical Support:
    Scan Wiz Page, cpp:265, SD_RSULT + SD_OPENDSERROR.

    Please, help me.


  • Anonymous Feb 01, 2009

    same as me

  • Anonymous Mar 22, 2009

    I click the "I have the same problem" button - and now you want me to describe my problem? You're a moron - I HAVE THE SAME PROBLEM

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  • Expert
  • 490 Answers

For any device to work you need 'drivers'. It is difficult to find a driver for an old product with a new OS like vista. You can try to get drivers for XP or Win2000 and use them.

S. Mohan

Posted on May 30, 2008

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Unable open twain source please


This is an issue with the Driver Installation, Get the drivers Uninstall and reinstalled from the CD.

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Dear DDuck,
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Thanks for your posting in FixYa.

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so i tried an alternative..here we go..
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next click new scan on top and that got me going.

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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"


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