Thanks for the address.
To be fair it has worked ok until recently as I now find I cannot use the action buttons on the front of the scanner. They won't work. I have to open MP Navigator (supplied software) and scan/copy/pdf etc from that direct, whereas before I could just push a button and it would immediately scan etc.
I don't know whether it has any relevance but this all changed about the time I loaded all the apps for my new EOS camera that I had for Christmas. Could there be a conflict. I suppose I could just systematically uninstall the lot but basically can't be bothered!
I know it is no big deal but it was much quicker to use the front buttons.
I am on an Intel iMac running OSX. 