In the save file, with that mod loaded, if you try to place a rail signal on the rail nearby the player it will trigger the crash. I've also was able trigger the crash by placing a rail down and trying to place the rail signal on it. in all cases the rail was not connected to any other existing rail

After removing that mod, I am no longer experiencing crashes

Thanks

Hmmm sorry, looks like my zipped file was still 450 mb, and didn't upload in previous post, i've just included what i suspect is the problem from above

Here you go

It's probably BetterBots, when 1.1 was released, that mod hadn't been update, someone on the mod page provided an updated one, which looks like just updating the factorio version in the code

I am consistently getting a c0000005 exception when trying to place a rail signal in the provided save. Previously I have placed many, but now it is causing a crash. I had a previous save that had the same problem, but I wasn't certain exactly what was causing it as it was occurring when bots were p...