I’m having the same problem in EPSON 10000XL. In fact none of the capabilities that I set really work. Does anyone know why?? Is this s bug in twain interface of Epson 10000XL??? Unfortunately I have no way to check with some other scanner.
Has anyone sucessfully controlled capabilities as per twain document?? I’d appreciate if you can provide me your source to have a look at. Please note that basic scanning works fine. Also I can not use the Epson’s own GUI for capability controlling.