Question about Canon CanoScan LiDE 25 Flatbed Scanner

1 Answer

Hi there, I have a Canon Flatbed scanner (Lide 25) and when i try to scan i get an error message as follows: 'Unable to load TWAIN server'. How can i fix this?

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  • 6 more comments 
  • jasonterry May 14, 2009

    Hi Alstech,

    I have uninstalled, re-installed many times before. however, i have just tried again with no success. Any more ideas?

    Jason


  • jasonterry May 19, 2009

    Hi Al,

    I have downloaded the uninstall software. Run it then reloaded the scanner drivers etc from the original CD and i still get the same error message. ie 'Unable to load TWAIN server'. Any more ideas?

    Thanks, Jason


  • jasonterry May 19, 2009

    Hi there Al,

    I'm running XP Home Edt, Version 2002, Service Pack 3.

    thanks,

    Jason


  • Anonymous May 20, 2009

    scanner shows in control panel, but does not work with any photo imaging programs (windows doc imaging, etc)

  • jasonterry May 21, 2009

    Hi Al,

    Thanks for the continuing support. I have just checked for the files and the only one i can find is the Twain.dll file. The other 3 are nowhere to be found! Any ideas how i can get them back?

    Thanks,

    Jason


  • jasonterry May 21, 2009

    Just to confirm - i have SP3 installed on my PC!

  • jasonterry May 22, 2009

    Hi Al,

    I have sent you an e mail from my e mail address.

    Thanks,

    Jason


  • jasonterry Jun 07, 2009

    Hi Al,

    Thanks for your help - re-installing the twain files worked - I'm now scanning away freely again!

    Thank you so much.

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Hi Jason

A Simple fix just reinstall your software that came with the scanner and this should re establish the link between twain and your scanner


Regards Alan (alstech)

Please dont for get to leave feedback if this was helfull

Posted on May 13, 2009

  • 2 more comments 
  • Alan Rothery May 14, 2009

    Hi jason



    further investigation reveals that the drivers dontuninstall correctley when you use the windows uninstall options



    try the link below download and uninstall your drivers using the canon uninstal then reinstall hopfully that should cure it



    http://software.canon-europe.com/softwar...=



    Regards Al

  • Alan Rothery May 19, 2009

    Hi jason

    can you confirm which version of windows youare running and i will script a reinstall if twain



    regards Al

  • Alan Rothery May 20, 2009

    Hi jason



    Here we go then first of all check that the twain associated files are present and correct by using windows search and checking for each one in thw windows directory



    The four files of interest are in the /Windows folder.
    Twain.dll
    Twain_32.dll
    Twunk_16.exe
    Twunk_32.exe




    if they are all present try to re register the two dll's as services to ensure that they are running correctly



    click start Run then type regsvr32 twain_32.dll then click ok



    click start Run then type regsvr32 twain.dll then click ok



    restart pc the hope and pray ! .



    if no good



    The only other thing i can think of is to uninstall sp2 and your canon software reinstall sp2 and then the software



    people have reported various imaging problems after installing sp2 (information from MS technet )







    Regards AL (Alstech)

  • Alan Rothery May 21, 2009

    mail me on alstech.services@blueyonder.co.uk and i will forward them to you





    Regards Al

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1 Answer

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

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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.

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Your post for CanoScan LiDE 25


Hi there, yes I did everything per your instructions, Toolbox is installed and it still says, "release the lock switch, detach I/F cable and reconnect. Scanner driver will be closed" and then after clicking on that it says "Unable to open TWAIN source. Please check connection then restart toolbox" I have been to the Canon site and downloaded driver sites and it says everything is working. but when I go to scan it comes up with the boxes I said before. Quite lost at the moment? Thanks Maureen. PS I have unstalled and reinstalled

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Canon scanner


TWAIN is the type of scanner driver that is used for this scanner. It is probably the most common type of scanning driver.

Did you install Toolbox? Not sure? Assuming this is Windows, click Start, All Programs, Canon. Look for open CanoScan Toolbox (4.9 I think). Once this is open, click the 'Settings' button. There should be a drop-down menu for 'Select Scanner'. Make sure this shows the CanoScan LiDE 25. If that scanner is not listed, then the scanner driver is not being seen or may not be installed.

Once it has been verified that the LiDE 25 is selected, click OK. Next, click the 'Save' button. Check the box for 'Display the Scanner Driver'. Now click the 'Scan' button at the bottom.
The next window that pops up should be ScanGear. If this happens, then everything is installed and the scanner is being detected properly. Attempt to scan or preview.

If there was a particular application you were trying to use and you are still having issues with it, please give those details.

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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.

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