> Exception type: Lua exception
>
> This error is usually caused by modding. Some game resources contain incorrect data.
>
> Details:
>
> Error message: error: [string "F:/Program Files (x86)/Steam/steamapps/worksh..."]:440: attempt to perform arithmetic on field '?' (a nil value)
> stack traceback:
> =[C](-1): __add
> F:/Program Files (x86)/Steam/steamapps/workshop/content/1066780/1991928620/res/construction/station/rail/mus.con(440): ?
> F:/Program Files (x86)/Steam/steamapps/workshop/content/1066780/1991928620/res/construction/station/rail/mus.con(482): terminateConstructionHook
> @res/config/base_config.lua(101): ?
>
>
> File name: F:/Program Files (x86)/Steam/steamapps/workshop/content/1066780/1991928620/res/construction/station/rail/mus.con
>
> Key: game/config/ConstructWithModules
>
> Minidump: F:/Program Files (x86)/Steam/userdata/70910535/1066780/local/crash_dump/85d27f31-2344-4bc1-a0e4-4c41e77cb4ad.dmp
>
> Mod: "Underground Station" (consider removing this mod and contacting the mod author)
>
> In file: c:\build\tpf2_steam\src\lib\lua\state.cpp:586
>
> In function: void __cdecl lua::State::Call(int,int)

stack traceback:
=[C](-1): ?
=[C](-1): upgradeConstruction
F:/Program Files (x86)/Steam/steamapps/workshop/content/1066780/1924671230/res/config/game_script/entry.lua(322): buildStation
F:/Program Files (x86)/Steam/steamapps/workshop/content/1066780/1924671230/res/config/game_script/entry.lua(476): ?


File name: F:/Program Files (x86)/Steam/steamapps/workshop/content/1066780/1924671230/res/config/game_script/entry.lua

Key: game/res/gameScript/entry.lua_handleEvent

Minidump: F:/Program Files (x86)/Steam/userdata/70910535/1066780/local/crash_dump/eccf34d7-117d-4ff7-b447-113d4220e69f.dmp

Mod: "Underpass" (consider removing this mod and contacting the mod author)