Ok I finally got my zephyr in the mail (nice, worth every penny). set it up on my 4x8 N-Unitrack - I have an Atlas #49364 SD-50 which came with a Lenz LE062XF decoder installed. The train runs fine, lights and all. Problem is, whenever i try to program it using the program track I get the "d nd" error. Zef manual says that this means the there is an open circuit on the programing track but there is none. I tried OPS too but it did nothing just blinked at me. Same error when i try to read a CV as well. The program track works with my MRC decoder so Im a bit at a loss. Is it possible the lenz decorder is bad if it runs fine and has the stock address (3)?