I've been running my layout with the Zephyr with no problem-I programmed 4 locos with no problem. I went to program some CVs today and I kepp getting an open circuit error with all my locos. Nothing has changed since I programed the address. All the wiring checks out. Hooked up an indepentant piece of track and wired it to the programming terminal and still getting the error. When I try to read the locos address, I hear a humming noice from the loco and it sometimes surges forward 1" or so then the open circuit error. Is there a problem with my unit????????:cry: :cry: :curse: :curse: