Holy DCS Batman! This is getting extremely old extremely fast. So the system is as follows: DCS was the only player on the layout. District one with 70 feet of track only one connection to TIU, ran signal test with MTH engine and got all 10's except for one spot which dropped to a 7 and an 8. So being happy with that performance for two days I would run that engine up and down the track and check signal which always resulted in getting 10's. (I cleaned the offending track) Now things get interesting. I hook up Lionel Legacy unit to system with the proper cables from MTH Serial cable from Legacy to TIU and one wire from legacy to third rail. Then put on track the ERR upgraded engine to run with the legacy controller. Power it all up, light comes on the engine and I throttle up and the engine moves forward a bit, sputters then stops with light out. Meanwhile down track a MTH engine starts some station chatter and comes to life. ???? Shutting power off and then back on still does not get the lionel engine light to come on. Yes I moved it to another section of track just to be sure to have clean track under it. So I take the engine back to the single test track I have set up with TMCC cab1 and engine functions as it should. Ok so I maybe dealing with one system killing the other. Getting back to the main layout, I disconnect the lionel legacy connections and check out the MTH Engine still on the layout track. It gives no response. I delete it from the handheld and try to enter it back in and of course it gives no engines found. Hmmm.... So I take the other handheld, turn it on and it works the engine forward/reverse shutdown/start up. I even check track signal and get 10's So I change batteries in the other remote and with the engine started up I try to add it to the remote. No Engine Found 
huh! I can control it with the other remote, have signal of 10 and it can't find it. So I foolishly power the remote that has control and delete the engine from it so I can see if the problem is only the other remote (lets call problem remote remote#2 and functioning remote remote#1) So I delete that engine from list and try to re-enter it and No Engine Found.... Put another MTH engine on track it both remotes can control it. I don' dare remove it from the remotes at this point. Best guess on my part is the Lionel test messed up the MTH engine on track. Mind you I was not programming that engine, just trying to control it. Things I can do are : reload remotes and see if I have control of the "faulty" engine (RS-3 Erie Lackawana 1057) re-load engine, (not sure what files to re-load on it)
This is frustrating as I have been wiring things by the book, so to speak, and it appears every step is like running through a molasses pond in January. No doubt I am doing things incorrectly, and want to find out what my bad practices are and stop them now. It seems this happened before on one of the MTH engines. Is this common? Help !!
