Yes I am using a Zephyr as a command station and yes the error message is  d nd so when placing the resistor on the track is there a certain position the resistor should be ( like between power in and the loco) I have a stand alone programing track

Yes I am using  a Zephyr system

Just purchased this switcher and no info was included about programing or how to use the dual mode. Am new to DCC and when I go to program it I keep getting a error message from my command