Ghost Wagons & Random Derailments for no reason.

[Iron Knights]

Hello
I am experiencing the same trouble over and over again, now one of my favorite saved games is stuck on "Train Derailment due to Player AI collision". Wagons were hooked up and good when I saved the game but somehow when loading they get corrupt. Cannot enter a Free Roam I played for days. This situation keeps occurring even with untouched sets of wagons, it seems to "crash" at 5mph into a ghost wagon with the same message as above, same happens with sets of wagons I dropped without a locomotive and coming back to it later. I like to build long trains but it doesn't seem to be a pattern in this problem.
I have unchecked all DLC and downloaded 2.8gb of files again, no cure.
Thanks.

[Broomwagon]

I think I know what this is, I did it all the time when I was learning to build freeroams, I assume you're placing wagons (or coaches). It's very easy to place wagons partly conflicting with each other with the result you mention. To avoid this make sure you click 'on' the coupling button, then click on the whole train when you've placed what you want, and drag it up and down the line a little to check they all move together.

P.S they make a little clink when they're coupled.

[Iron Knights]

No, I am not even close to understanding the editor.
I am talking about the free roam scenarios, pre-built.

[Broomwagon]

Ah....if not used to the editor......I can only suggest that the freeroams weren't created with a great deal of care. You could check and rectify using the editor but if you're not used to it, it's probably a bit beyond you at present. Just a tip, if you start using the editor always clone the route and work on the clone.

[OldAlaskaGuy]

I have had certain older rolling stock, usually boxcars and hoppers hitting tunnel walls on curves at higher speeds causing this, Extremely hard to find. Some older stock has a bit more sway built in.

[Iron Knights]

I think I have had one of those tunnel derails in the German lines too.
But what I am talking about is a dynamic error that re-occurs.
My now locked Cajon Pass free roam gives the error at start "Train Derailment due to AI collision" sometimes crashing right out of the game. Found 2 locomotives slid "down the track" about half way through a route, there is a serious bug here.

[Iron Knights]

1261 Files failed to validate and will be reacquired. Same as the day I installed the game when verifying files, every single time, not one clean pass.
What I need to do is debug my saved game first, no idea how to reset derailment.