Could not open the twain source windows 10

TWAIN is now “deprecated” in W10 — if you still need TWAIN you’ll have to either install W7 / XP / VISTA Virtual machine and run your scanner from there. Windows now uses WIA for “acquisition” type stuff — i.e getting image from scanner etc.

TWAIN Compatibility (Windows Drivers)

Alternatively there’s a piece of Paid software that still keeps these old scanners running –haven’t used it for agaes but it was very good from what I remember

VUESCAN

VueScan Scanner Software for Windows, Mac OS X and Linux

If you managed to get that scanner working before on W10 you must have been quite lucky or the driver was still working. TWAIN as scanner technology is not supported any more by Ms. The software is using WIA in some sort of compatibilty mode — which *might* or *might not* work depending on all sorts of factors.

If you like the scanner the VUESCAN option seems to be the best – for most normal functions it will cost you USD 35 or so — or around 22 GBP / 30 EUR.

Cheers
jimbo

Hi thereTWAIN is now “deprecated” in W10 — if you still need TWAIN you’ll have to either install W7 / XP / VISTA Virtual machine and run your scanner from there. Windows now uses WIA for “acquisition” type stuff — i.e getting image from scanner etc.Alternatively there’s a piece of Paid software that still keeps these old scanners running –haven’t used it for agaes but it was very good from what I rememberVUESCANIf you managed to get that scanner working before on W10 you must have been quite lucky or the driver was still working. TWAIN as scanner technology is not supported any more by Ms. The software is using WIA in some sort of compatibilty mode — which *might* or *might not* work depending on all sorts of factors.If you like the scanner the VUESCAN option seems to be the best – for most normal functions it will cost you USD 35 or so — or around 22 GBP / 30 EUR.Cheersjimbo

Recently I replaced my laptop and one of the important things that I needed to get working on it was my Canon LiDE25 scanner that I used for askgarth.com tasks. Each time I replace my laptop (which happens frequently enough) I encounter the same problem with this Canon scanner, so I thought that I would share with all of you how to solve this issue because it can be a bit annoying. BTW you can download the Canon Scanner software on their site. Just as an aside, I need to do this on my Windows 10 and Windows 11 computers too!

Below is the error message that I always get:

Unable to open TWAIN source
Please check connection
Then re-start Toolbox

The problem is that the TWAIN drivers are not within the computer system variables path.

How to Solve the Canon Scanner – Unable to Open TWAIN Source Error

This problem took a while for me to find and solve . But one you know what the problem is the solution is easily fixed.

What I do first is open the Control Panel.

Next I click System and Security.

Then I click System.

Next, I click Advanced system settings.

Then, I click Environment Variables…

Then I scroll down on the system variables and find the Path, highlight it and then click Edit.

Next I add the path name for my TWAIN driver to the Path system variable. In this case, it is c:windowstwain_32CNQL25. Lastly, I click OK three times to return to the Control Panel, and then I exit the Control Panel.

Finally, I restart the CanonScan Toolbox. Now my Canon scanner works without any issues and the same should be true with your scanner.

I hope this solved your problems with your Canon Scanner. if you have questions you can always tweet me @garthmj. I will do my best to get back to you once I see it.

I am using a Canon Scanner (CanoScan LiDE 60). It has been working fine but it stopped working today with error message: Unable to open TWAIN source

Here is how to fix it:

  1. Check if you have the following folder: C:Windowstwain_32CNQL60
  2. If not, go to C:Windowstwain_32, and see if you have a folder similar to CNQL60
  3. Then copy the full path of the folder into clipboard
  4. click Windows’ Start button, then search “environment”, then click “Edit system environment variable”
  5. click the “environment variable” button
  6. select path variable, then click “Edit…” button. Then type ; and then paste the canon path.
  7. Click OK.

Now the problem should fix.

Here is a useful link:

http://weblogs.asp.net/jeffwids/archive/2009/11/02/canon-scanner-unable-to-open-twain-source.aspx

Canon Scanner – Unable to open TWAIN source

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:

image

—————————
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:Windowstwain_32 and there should one other folder in there.  In my case it was  named CNQ4803.

image

This is the path that is needed to be added into the PATH environment variable.

C:Windowstwain_32CNQ4803

 

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.

image

This will bring up the System Properties dialog (it should already be on the Advanced tab).

image

At the bottom of this dialog is an Environment Variables button.  Clicking this button will bring up the Environment Variables dialog.

image

In the bottom panel, scroll until you find the variable named Path.  Select this one and then hit the Edit… button to bring up the Edit System Variable dialog.

image

In the Variable value text box, scroll all the way to the right and then add in the path C:Windowstwain_32CNQ4803 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.

TWAIN is now “deprecated” in W10 — if you still need TWAIN you’ll have to either install W7 / XP / VISTA Virtual machine and run your scanner from there. Windows now uses WIA for “acquisition” type stuff — i.e getting image from scanner etc.

TWAIN Compatibility (Windows Drivers)

Alternatively there’s a piece of Paid software that still keeps these old scanners running –haven’t used it for agaes but it was very good from what I remember

VUESCAN

VueScan Scanner Software for Windows, Mac OS X and Linux

If you managed to get that scanner working before on W10 you must have been quite lucky or the driver was still working. TWAIN as scanner technology is not supported any more by Ms. The software is using WIA in some sort of compatibilty mode — which *might* or *might not* work depending on all sorts of factors.

If you like the scanner the VUESCAN option seems to be the best – for most normal functions it will cost you USD 35 or so — or around 22 GBP / 30 EUR.

Cheers
jimbo

Hi thereTWAIN is now “deprecated” in W10 — if you still need TWAIN you’ll have to either install W7 / XP / VISTA Virtual machine and run your scanner from there. Windows now uses WIA for “acquisition” type stuff — i.e getting image from scanner etc.Alternatively there’s a piece of Paid software that still keeps these old scanners running –haven’t used it for agaes but it was very good from what I rememberVUESCANIf you managed to get that scanner working before on W10 you must have been quite lucky or the driver was still working. TWAIN as scanner technology is not supported any more by Ms. The software is using WIA in some sort of compatibilty mode — which *might* or *might not* work depending on all sorts of factors.If you like the scanner the VUESCAN option seems to be the best – for most normal functions it will cost you USD 35 or so — or around 22 GBP / 30 EUR.Cheersjimbo

Back again with another commonly-asked question of our Technical Support Team.

“I’m trying to scan a document, but I keep getting a TWAIN error.”

Issues with the TWAIN driver indicate that the computer isn’t recognizing the scanner driver, and Scan Workstation is reporting a problem. However, TWAIN driver errors are not caused by the Scan Workstation.

A TWAIN driver is software that handles communication between a PC and a scanner.

Updates or reboots to the scanner could be the reason the scanner is no longer recognizing the TWAIN driver. To fix this problem, you should try the following:

  • Try rebooting the scanner, or unplug the scanner from the workstation and plug it back in.
  • Open the TWAIN driver you installed with your scanner and check the scanner settings.
  • Upgrade your TWAIN driver from the manufacturer’s website.
  • Check whether other programs on your PC can scan.
  • Uninstall and reinstall the scanner software.

If none of these remedy the TWAIN error, contact the scanner’s manufacturer for device-specific fixes.

Scanner not working is a common issue in Windows 10, especially in new Windows 10. If your scanner doesn’t work in Windows 10, don’t worry. You’re not a lone. Many Windows 10 users have reported this issue. You can fix the problem with one of the solutions below.

There are three solutions you can try to fix the problem. You may not have to try them all. Just try them one by one until you find the one that works for you.

Solution 1: Repair Corrupted System Files

The problem can be caused by corrupted system files. To check and repair the corrupted files, follow these steps:

1) Hold Down Windows logo and press R key at the same time to invoke the run box.
2) Type cmd and click the OK button. 

3) When Command Prompt opens, type sfc /scannow and press Enter
The process will take several minutes until the verification 100% complete.

Note that you are required to run this command as an administrator. If not, you will get the following message when your run it. In this case, please open command prompt as an administrator and try again.

If you are not sure how to open command prompt as administrator, refer How to Open Command Prompt as Administrator in Windows.

If some related services are not started, the scanner cannot work properly. 

Here are the related services. Be sure these services are started:

Remote Procedure Call RPC
DCOM Server Process Launcher
RPC Endpoint Mapper
Shell Hardware Detection
Windows Image Acquisition (WIA)

Steps below are for your reference how to check for the service status. Here, let’s take Shell Hardware Detection for example.

1) Hold Down Windows logo and press R key. A Run dialog box will pop up.
2) Type services.msc in the run box and click OK button. 

3) Find Shell Hardware Detection from Name list. Right-click on it and select Properties from the context menu. 

4) If you see “Service status” is Stopped, click Start button and OK button. Then the service will start again.

IMPORTANT: Repeat steps these steps to check and configure other related services. 

If the scanner driver is having problem, the scanner cannot scan correctly. So updating the driver may resolve the problem. You can go to your scanner’s manufacturer’s website to download the latest Windows 10 driver. For some models, manufacturer might not release Windows 10 driver. In this case, try the driver for Windows 7 or Windows 8, which is always compatible with Windows 10.

If you don’t have time, patience or computer skills to update drivers manually, you can do it automatically with Driver Easy.

Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.

You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):

1) Download and install Driver Easy.

2) Run Driver Easy and click Scan Now. Driver Easy will then scan your computer and detect any problem drivers.

3) Click the Update button next to a flagged scanner driver to automatically download and install the correct version of this driver (you can do this with the FREE version).

Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).

Hope the solutions help you fix scanner not working in Windows 10 issue. If you have any questions, please leave your comment. We’d love to hear of any ideas or suggestions.

Written by Jane