Unable to open twain source - canoscan lide 500f. "unable to select twain source" - canon lide 25 scanner issue. the canoscan toolbox 4.9 is in the program (x86) folder). this is the same as the other windows 7 machine. the other machine did not need the path variable and it works just fine.. If not, go to c:windowstwain_32, and see if you have a folder similar to cnql60 they copy the full path of the folder into clipboard click windows' start button, then search "environment", then. Canoscan g2400 unable to select twain source
