Hi RAF69 and paul after a brief test this morning, I am pleased to report the following ;- using the elite on its own i read values on several cv's using elite and railmaster, changing the box to read 1 to 255 ,I started to get multiple reading of cv's. As it would have taken over one hour to read all 255 I exited after approx 40 were read I think with your helpful assistance the problem is solved best regards steamfreak