--20-20596-1 (NS SD60E, PS3): Long-term resident of the test track loop. Been on-track for the better part of a year. It's the only active engine in my remote (half-dozen others are in 'inactive' status. Starts and runs, all functions OK. Was pulling a dummy unit (20-2944-3, NS C40-8W) and about a 20-car train of mostly Premier and AtlasO freight.
I was able to start-up the NS SD60E, but subsequent attempts to move it also resulted in 'Check Track'.
--The SD60E, sitting in the same spot where DCS claimed not to see it a few minutes ago, starts and responds normally. I should probably try an isolated programming track for the recaitrant locos but had not since that first SD60E that's been on the loop all this time acts 99% normal.
The UP unit shut down on the same length of track that the SD60E runs with no problems. I'll try bypassing the TIU to see if it runs conventionally. Responses will be slow this week owing to work hours..
You lost me somewhere in here. You got one engine that runs but then, doesn't run???