Can not read CV message

Jim, try programming on the main. I have never been able to program a MTH PS3.0 locomotive on a program track, always get the same message you did. I also have the same NCE equipment you have.

Thanks Jack, I'll report back.

A lot of decoders require more power (amperage) to program than many systems put out on the program track without a booster.   

So programming on the main is an option or getting a dedicated small system for programming is another.    \

Be sure to turn off power to all aother locos before trying to program on the main.

I have now tried programing "on the main" using option 1, address program, using the PP system manual.  I did not get the "Can't read CV" message after loading the addresses.  Tried to activate both long and short addresses.   Still nothing on either engine.  Given that both locos react (lights, sound and movement) to conventional ac or dc power with the DCS switch employed,  yet have no reaction when they are switched to DCC has me baffled.  Any programing ideas are appreciated.

Jim

See this link:  https://www.mthtrains.com/usin...equipped-locomotives 

That link is the ticket.    I ended up calling MTH and I was lead through this same CV reprograming on this MTH link  to success on both engines.  Thank's to everyone with their timely responses to my quandary.

Jim

I used the same instructions to program my MTH locomotives. It worked for me. Good luck.

I do believe somewhere MTH does say to program on the main because the programming track doesn't supply the power needed.

As for using the NCE with them, I have never tried reading the CVs.  I just put the loco on the track and went through the prompts in the remote to reprogram the ID for long address without having to manually change any CVs.