Hi guys have now got my navplus unit fitted and working ok.Just one little problem ,have gone bleary eyed looking through all the info on forum. When I switch on the unit I get a tmc error message due to the fact that I have not got the tmc box on the system.I can turn off the message by pressing the mode switch a couple of times but when I turn on again the message appears again.Is there anyway of blocking this cheers, edkins UK