Saturday, January 30, 2010

Solution for: "Cannot open TWAIN source" (Canon)

24.01 Error message:

  • "Cannot open TWAIN source"

Affected products:

  • Canon scanners like the "CanoScan LiDE 60"

What does not hep:

  • Updating/reinstalling CanoScan toolbox or drivers
  • Trying other USB ports


  • Shorten your "PATH" environment variable. If the resulting variable is "too long", the TWAIN error will occur. After shortening the path, scanning will immediatly work (no restart required.)

(Thanks to “Graf_d” from this thread for providing the solution)


likeaboss said...

evil genius solution :D

Anonymous said... suggests a way to test scanners easily, before you reinstalled your scanner driver.

Pablo T said...

Yes, it seems that the case really is in the drivers, I would advise the list of drivers that I usually use in such cases. This will certainly help just to download and use the drivers for Windows.