Object reference not set to an instance of an... etc

[ByLeven]

I have major trouble playing the game these days, and after finally giving up on my latest city, I started a new map. I was able to load the new map without issues, and started laying out some basic networks. Saved and closed.

Loaded the next day, and get instantly bombarded by this: 'Object reference not set to an instance of an object [System.NullReferenceException] Details: No details'

From what I gather is that this message arise from missing assets trying to load, most likely a vehicle. But I haven't built a single building yet, and I have now even disabled all custom vehicle assets with the 'Advanced Vehicle Options' mod.

From 'Loading Screen' report:
The following custom assets are used in this city
Notice that network assets are not yet supported in this section.
Buildings and parks
Props
Trees
754129192.Norfolk Island Pine_Data
963853793.Lp2 split trunk _Data
963853793.Lp4 twin trunk medium _Data
963853793.Lp5 full canopy _Data
963853793.lp7 extra full _Data
Vehicles
Props in buildings and parks
Trees in buildings and parks

(I do, in addition to trees, have networks from 'Networks Extension 2' on the map)

Assets that failed to load
No failed assets.

Does anyone have a suggestion about what to do?! (I'm getting really sad over here )

 

[ByLeven]

From output_log:

Simulation error: Object reference not set to an instance of an object
at BuildingAI.SimulationStep (UInt16 buildingID, .Building& buildingData, .Frame& frameData) [0x00000] in <filename unknown>:0
at BuildingAI.SimulationStep (UInt16 buildingID, .Building& data) [0x00000] in <filename unknown>:0
at ConfigureOutsideConnectionsLimits.OutsideConnectionAIMod.SimulationStep (UInt16 buildingID, .Building& data) [0x00000] in <filename unknown>:0
at BuildingManager.SimulationStepImpl (Int32 subStep) [0x00000] in <filename unknown>:0
at SimulationManagerBase`2[Manager,Properties].SimulationStep (Int32 subStep) [0x00000] in <filename unknown>:0
at BuildingManager.ISimulationManager.SimulationStep (Int32 subStep) [0x00000] in <filename unknown>:0
at SimulationManager.SimulationStep () [0x00000] in <filename unknown>:0
at SimulationManager.SimulationThread () [0x00000] in <filename unknown>:0 [Core]

(Filename: C:/buildslave/unity/build/artifacts/generated/common/runtime/DebugBindings.gen.cpp Line: 51)

 

[Avanya]

This really should go in the Support subforum instead and include the output log as an attachment so we can have a look at what's going on.

 

[ByLeven]

Ok sorry... I thought maybe that subforum was for vanilla issues (But then again, who plays vanilla...)

The output log was overwritten soon after I posted, because I started a thorough cleaning of the mods - Disabling all, and re-enabling them again in batches, removing or replacing quite a few. It was painful work, but after hours of load screen, the issue is solved. Never caught which mod caused it though.