Sound, lights but no action

[atsf2021bnsf]

I junked my old Lenz system and have a brand new Digitrax Zephyr Express.
Most of my engines run fine
BUT
I have three Bowser SD40-2's and a Scaletrains SD40-2, all with the factory set address "3" where everything works but they will not move. The motor sound notches up as you open the throttle but all remain stationary. I set about trying to change one loco's address to its road number. That did not change running. I then did a factory reset cv8 = 8 and it went back to responding to address 3 but still no movement.

Any suggestions ? 
I also found that when I tried to reset cv8 a few times I got error messages "program track empty" though it contained a loco where all sounds and lights were functioning fine.
Goodness this is frustrating. 
JM

[Mark R.]

There are a few functions that would cause that if they were turned on. Go through ALL the function listings and make sure they are all turned off first.

Mark.

[atsf2021bnsf]

Thanks Mark.
Finally got them all working.
Dunno what changed but one thing I did is that I shortened the programming track to just one section of about 12 inches. P{riot to that I was trying to programme using the whole length of the test track of about 10 feet. maybe this as dissipating the signal producing an error message.
JM