I have a Canon CanoScan 4400F Scanner and the other day I was unable to get it to work. I use the Canon software CanoScan Toolbox to operate the scanner and when trying to scan I was getting the following error message: --------------------------- CanoScan Toolbox --------------------------- Unable to open TWAIN source Please check connection Then re-start Toolbox --------------------------- OK --------------------------- Searching the Internet for this problem turned up several people having the same problem and several solutions which looked like they may or may not work. One of the recommended solutions was to make sure a certain folder path is in your PATH environment variable. As it turned out this was the problem, so here is how to add that path back into your environment variables. First, determine the correct path to add into the PATH environment variable. Look in C: Windows twain_32 and there should one other folder in there.

Drivers and Manual for Canon CanoScan 9950F. The WIA Drivers for Windows XP or Windows Me, and the TWAIN Drivers for Windows 2000 or Windows 98 SE. Even tho I did the update from Canon - I am still getting a message that I need a WIA driver!!!! Maybe the vista WIA drivers will work since canon doesn't list one for win 7, though you'll probably be disappointed with the lack of control wia gives. WIA Driver - 9950F WIA Driver Ver. 1.2.1.0 (Windows Vista64). CanoScan 9950F. Might be better to either scan outside of pse 15 and open the scans as.

In my case it was named CNQ4803. This is the path that is needed to be added into the PATH environment variable. C: Windows twain_32 CNQ4803 Now, follow these instructions to get to the dialog to modify the PATH environment variable. Control Panel >System >and then choose Advanced System Settings in the left hand column. This will bring up the System Properties dialog (it should already be on the Advanced tab). At the bottom of this dialog is an Environment Variables button.

Clicking this button will bring up the Environment Variables dialog. In the bottom panel, scroll until you find the variable named Path. Tf2 Weapon Hack No Survey - Download Free Apps. Select this one and then hit the Edit button to bring up the Edit System Variable dialog. In the Variable value text box, scroll all the way to the right and then add in the path C: Windows twain_32 CNQ4803 that was determined earlier. Make sure to separate this value with a preceding semi-colon.

And also be careful not to make any other changes to this value. Now OK your way out of all of the dialogs and CanoScan Toolbox will now work as expected.

Bodyguard Champlain Treadmill Manual. >>look first if the scanner is installed without error in device manager After 3 attempts to install driver(s) from Canon web site, carefully following all instructions, All went well up to and including 'installation successful' message. This included connecting/reconnecting CanoScan scanner as instructed. As usual, results in dialog window asking for 'Source' (e.g. >>try a scan from PAINT>import from scanner or camera As expected, this did not work.