Ok thanks, reverted to older and much cheaper chips sorts the problem. My concern is that this technology may affect ALL DCC concepts chips and may make all incompatible with frog juicers. I'm still awaiting a reply from the DCC concepts help desk. Yes I do use megapoints system and servos and micro switches in the fiddle yard and 'out of camera'. I only use juicers on the visible part of the layout.
Thanks Renny Lord