Question about Canon CanoScan N656U Flatbed Scanner

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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.

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  • Anonymous Sep 09, 2008

    WON'T COME ON LINE AND SCAN

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  • 73 Answers

Track down the twain driver for that scanner.. thats the box that opens when you scan... google for the company, download the driver.. re-install tadahh.
Still no luck? manually remove the old one.. use search to finfd the twain folder in your windows system (prob twain32) then re-install.
Still no luck? Scanner has died.

Posted on Feb 16, 2008

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When i try to scan i get this message: unable to open TWAIN source Please check connection then re-start Toolbox the connections are tight


Driver mismatch - the driver of the scanner has forgotten the location of the TWAIN driver because another software has been using it lately. Follow this
http://weblogs.asp.net/jeffwids/archive/2009/11/02/canon-scanner-unable-to-open-twain-source.aspx

Feb 20, 2011 | Canon CanoScan LiDE 30 Flatbed Scanner

1 Answer

I have tried to access my yahoo account and have been unable to open it,I'm being told that it can't be oened due to a web problem


Maybe their servers are down temporarily...
Seems to be working at the moment...
Have you tried here.?

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Jul 20, 2009 | Yahoo YHT-630 System

1 Answer

I need a TWAIN driver for a Canon CanoScan N670U


Dear DDuck,
there is no Vista driver for this scanner, thatswhy it is not working with Windows Vista.

Regards

Dec 04, 2008 | Office Equipment & Supplies

3 Answers

Unable to select TWAIN source


tried uninstallin and installin canon scanner drivers..nothing works..still seeing unable to select twian source..

so i tried an alternative..here we go..
on vista 64 os/vista any version..click Start>All programs>Windows fax and scan

next click new scan on top and that got me going.

some say there are issues with the way usb talks to old scanners with new operating systems like mine (vista 64). hope it helps until you find the actual cure.

Jun 24, 2008 | Canon LIDE20 Flatbed Scanner

1 Answer

"Unable to open TWAIN server" Please assist


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

May 29, 2008 | Office Equipment & Supplies

1 Answer

Canon Flatbed scanner model D646U ex for Windows XP


Could be a problem with the cables themselves. Try a new set or different set of cables and see if this resolves the issue. Also make sure that you installed the correct version of the driver for your OS.
Should you still have difficulties, try a clean boot as explained below:
http://www.fixya.com/support/r545614-installation_problems_clean_boot_install

(Just replace "camera" in the procedure for scanner.)

May 15, 2008 | Canon CanoScan D646U Flatbed Scanner

1 Answer

Lock Switch and IF cable


Mine was doing the same thing. When I get on the program, before I click "acquire" to preview and scan, I click OFF the toolbox and then everything seems to be okay and I can go ahead and scan.

Nov 27, 2007 | Canon CanoScan LiDE 25 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

2 Answers

Initialization failed - Unable to acquire TWAIN-compliant device


Hello,

 

I have seen your message stating that "Initialization failed - Unable to acquire TWAIN-compliant device" error is received when trying to connect USB-Parallel type to your Laptop.

 

Well,  Printer  Panasonic UF4100, recommends to use only " Printer/Scanner Interface as Bi-directional Parallel (IEEE1284) " means you need to use Parallel cable to connect Printer to the Computer/Notebook.  You may receive some communication error messages if you are using a  "PORT REPLICATOR CABLE"( USB TO PARALLEL connector).  The error message that you have received is related to the communication error. Futher, if you use same USB- Parallel cable for long time the Printer Hardware functionality might go bad, since Printer memory gets confused and will not read or detect the Cable , since it is not a cable to use  mentioned by Panasonic Manufacturer.

 

Let me tell you, general functionality of Printer like Printing would work even if you use USB-Parallel cable. But it is not a case with Scanner and Fax functionality.

 

Hence, I recommend you to use only Parallel cable to connect your Printer to the Laptops.

 

I hope that this will resolve the issue for you.

 

You can email me at thumuvikram@rediffmail.com if you need further assistance.

 

Bye.

Oct 17, 2007 | BafoTech BAFO BF-1284 Parallel Adapter

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