Failure of DCS Engines to answer commands

Did you try adding a new engine with just the M1 on the track?

Are these Proto 2 or Proto 3 engines ?

I’m guessing the engines were presently in your remote. Then you deleted them and re added them on your test or programming track when they didn’t work on the main layout. If that’s the case. Did you try adding them on your main layout first ?  Did you re try again on your test track after they failed on the main layout and did they power up in DCS without re adding ? I’ve had issues at times with Proto 2’s with a battery. When an engine has been idle for a while. Deleting it and re adding usually gets it up and running. Until you shut it down. If the battery is weak and it doesn’t down properly. It will lose it’s newly assigned ID and the remote can’t find it.

A good test if it’s battery powered. With the engine running. Kill the fixed voltage to the layout. You should hear shutdown sounds that last at least 5 seconds.

PS2/PS3 locomotives shouldn't "lose their settings" after sitting for several months. I've let one of my PS2/PS3 locomotives sit for a year, put it on the track, and they worked perfectly fine under DCS. What are the item numbers of the locomotives having the issue? If they are PS2 make sure the batteries are charged.

For the first reply: no

For second reply: No I did not try what you recommended but I did change out the Battery for the Army Gensis (20-21056-1) for a BCR 2 After I changed out the Battery and started to put it back together, I had a dual white connector {the gray wires are at the front of the engine that did not appear to connect to anything. It appears to come from the top of the motherboard. Prior to that I had tried to add the engine after I deleted it but it was not recoverable or  could be added. All this was done on my test track.

Here's a couple recent threads you may want to peruse with symptoms identical to yours. Maybe worse. Seems MTH has some major-league snafu that came out of nowhere. The lower link is my thread. I had DCS on 2 iPads and an iPhone trouble-free since I bought my first TUI/WUI a couple years ago. I went away on business early in February and came home to a mess.

Sadly, I do not have handheld remote. I'm very curious how the WUI would perform. I've played with wifi settings, airplane blah blah (which hasn't mattered for 2 years now), several resets, all to no avail.

I did get a 2-unit MU to run for about 3 minutes. First, it dropped one loco. "Okay, I'll run one loco." Then, it said "No WIU found", even though it shows "connected to MTH" in settings.

It was easy to blame Apple, but after tonight, I'm not so sure. I got ahold of a blank and reset Android phone from a neighbor and started from scratch: New email, fresh DCS App install, etc etc. When I powered it up, the Android saw about 6 of my dozen MTH engines, all addressed with the same numbers that would have been on my iPads but nothing would run. Many of these PS3 engines are less then a year old and ran fine until this baloney started. Pushing the reset down on the WIU did nothing.

Ihttps://ogrforum.com/...lready-paid-for-this

https://ogrforum.com/...9#171907990259250869

Pretty frazzled here. Hopefully, you'll have better results than I'm having.