NullReferenceException Having a lot of trouble here

[Ishkur]

Even with verbose debug on, the console doesn't tell me enough to figure this out, so I'm having a tough time here.

Would really appreciate some help:

void Start()
		{
			GameEvents.onLaunch.Add(BuildShip);
		}

public void BuildShip(EventReport e)
		{
			AvailablePart ap = PartLoader.getPartInfoByName ("cupola");
			UnityEngine.Object obj = UnityEngine.Object.Instantiate(ap.partPrefab);
			Part newPart = (Part)obj;

			newPart.gameObject.name = "cupola";
			newPart.partInfo = ap;

			ShipConstruct newShip = new ShipConstruct("hello world", "hello world2", newPart);
			ShipConstruction.PutShipToGround(newShip, this.part.transform);
			ShipConstruction.AssembleForLaunch(newShip, "Kerbin", HighLogic.CurrentGame.flagURL, HighLogic.CurrentGame, new VesselCrewManifest());
		}

Running this gives me this error code at launch:

[Exception]: NullReferenceException: Object reference not set to an instance of an object
Part.InitializeModules ()
Vessel.Initialize (Boolean fromShipAssembly)
ShipConstruction.AssembleForLaunch (.ShipConstruct ship, System.String landedAt, System.String flagURL, .Game sceneState, .VesselCrewManifest crewManifest)

The error disappears when I remove ShipConstruction.AssembleForLaunch, but no ship appears. I printed all my instanced object, so I know everything I've meant to instance so far has been instanced.

[Guest]

The error disappears when I remove ShipConstruction.AssembleForLaunch

Then it has something to do with that function call, likely. I'd check on HighLogic.CurrentGame.flagURL and HighLogic.CurrentGame and make sure neither of those is returning null, and make sure that HighLogic itself isn't null. Maybe try HighLogic.fetch.CurrentGame? Not sure if HighLogic has a fetch...