Question about Canon CanoScan LiDE 70 Flatbed Scanner

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Error message When I try to scan with my CanoScan LiDE 70 a message comes up that says: "Unable to open TWAIN source.Please check connection then restart toolbox." I've checked the connection.Even tried a new cord.When I connected the scanner to another computer and it worked fine.Any suggestions?

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Hi toolpusher

Try going to CanoScan Toolbox > Settings and reset the 'defaults' button at bottom... this will restore factory settings and hopefully fix your problem... The other error message you can expect to get is "unable to scan - insufficent memory, check your **** space' (or something similar)... same fix works for both! ...Have had both messages on mine, sounds like a semi-regular conflict on some sort, but seems to be easily fixed. Good luck :-)

Posted on Sep 30, 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

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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?


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

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Your post for CanoScan LiDE 25


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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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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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