Mod: Westbridge Forest
John666, I cleared the key inputs and the problem went away. However, when I put my mods back into the mods folder, the problem came back. So, I added the bindings listed above and now everything is running just fine.

Mod: Westbridge Forest
First off, I love the map and have spent many hours on it. Unfortunately, as others have mentioned, I have experienced the problem with the game crash on certain keystrokes.

I am running FS15 with update 1.2 installed. For testing purposes, I have no other mods in the folder except Westbridge_Forest_V2_1.zip.

The game will crash the moment I press J,K,M or N key and the log gets flooded with:
Error: Running LUA method 'update'.
D:/code/lsim2015/build/finalbin/dataS/scripts/InputBinding.lua(931) : bad argument #1 to 'pairs' (table expected, got nil)

For now, I try to keep from pressing those keys and the map runs fine.