Problems scanning Until recently I had a working scanner, now each time i click twain the scan manager pops up and tells me to please verify that I have unlocked the scanner hardware, and that the unlock is on the bottom of the scanner. There are no buttons on the base of my scanner.... I have tried removing the programme and reinstalling but the problem persists. Would appreciate any suggestions

The TWAIN drive should be installed when one installs the actual "Drivers" for the unit itself, accordingly I provide you with the download link below.... look for and install ALL drivers and software, especially the Scan manager and TWAIN drivers....


http://usa.canon.com/cusa/support/consumer/scanners/canoscan_series/canoscan_n1240u

Please trash the twain driver completely.
- Trash epson scan and epson scanner monitor from applications.
- Go to hd. Go to library, then application support. Trash epson scanner module.
- Go back to library. Click on image capture. Trash twain data sources.
- Go to the hd. Click on users. Click on your computer name. Click on Library. Click on preferences. Click on the epson folder. Trash epson scan.
- Empty the trash and restart your mac.
Log on to epson.com. Install the epson11926.dmg.

Your Train source may be your scanner Twain driver. Reinstall the driver. 
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=235&modelid=11463#DownloadDetailAct

This may happen because of overload to memory. If all are ok and still this error comes up means, the twain driver takes more time to load. wait for some seconds and then click scan, it will go.

Try to clean the hard disk and defrag the drive.

twain is a driver, it could be corrupted at this time uninstall again and reinstall the software

You can program the scan button by going to "Control Panel" and "Scanner's and Camera's.

Right Click the scanner and go to "Properties"

Select the "Events" tab

It should allow you to program your one touch button from here. I just wanna verify that you do have the CX3200 and not a Stylus Scan 2500?

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.

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.

Hi,

There could be a communication problem between the All-In-One and the PC.

1. Check bi directional communication:
=============================

Scan from WIA:

For Windows 2000/Me/98
To isolate the issue I suggest you to try scanning from Imaging for Windows which will scan from the all-in-one product using TWAIN software instead of the HP software.

1.Verify that the all-in-one product power is turned on and the printer cable is properly connected.
2.Click Start then Click Programs then Click Accessories then Click Imaging.
3.From the Imaging application, click File, and then click Select Device.
4.Select the HP all-in-one device from the TWAIN source list.
5.Click File, and then Acquire Image.


For XP:
1. Verify that the all-in-one product power is turned on and the printer cable is properly connected.
2. Click Start.
3. Click All Programs.
4. Click Accessories.
5. Click Scanner and Camera Wizard.
6. Follow the Scanner and Camera Wizard instructions to scan images to the computer.

For Vista:
Scanning with Paint
1)Click Start(Windows LOGO ) on your computer
2)Click All Programs.
3)Click Accessories.
4)Click Paint.
5)Click File and then click From Scanner or Camera.
6)Click Scan

Scanning with Windows Fax and Scanning
NOTE: This feature works only with Windows Vista Ultimate, Windows Vista Business, and Windows Vista Enterprise.
Click Start(Windows LOGO ) on your computer
Click All Programs.
Click Windows Fax and Scanning.
Click New Scan.
Click File and then click Scan.

Scanning with Windows Photo Gallery
Click Start(Windows LOGO ) on your computer
Click All Programs.
Click Windows Photo Gallery.
Click File and then click Import From Scanner or Camera.
Click Import.
Click Scan.
If you are unable to scan using the above methods, please proceed to the next step:

2. Check USB cable.

3. Uninstall and reinstall th All-In-One software:

http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?product=90792&lc=en&cc=us&dlc=en&lang=en&cc=us


If the issue still persists please post back so that i can assist you further.

Thank you

Pradeep Paul.

Try deleting temporary files.