The Windows version of Scan2Invoice communicates with your scanner via the so-called "TWAIN" standard. Scan2Invoice for Windows requires the TWAIN driver for your scanner to be installed.


If the TWAIN driver is not installed, the follow problems can occur in Scan2Invoice:

- Your scanner is not listed in the list of available scanners when you press the "Select Scanner" button

- Not all pages are scanned into Scan2Invoice when using an Automated Document Feeder (ADF) / Multi page scanning is not working.

To resolve these problems you need to check if your scanner supports the TWAIN standard and download and install the latest TWAIN driver from the scanner manufacturers website.

Also, please make sure you are using the TWAIN driver and not the WIA driver.

As an example, there are 2 scanner drivers installed for the same scanner in the picture below. You can identify the WIA driver as it usually has WIA in it’s name: 

- Dell 133 

- WIA-Dell 133


If you are having problems with scanning multiple pages, try not to use the WIA driver provided by Microsoft. Instead, please download and install the latest TWAIN driver from the manufacturers website. This will often resolve the problem.


You can check if the TWAIN driver works by using an open source scanning software:

That way you can confirm if the scanner is working independently of Scan2Invoice.