NullReferenceException error help

Questions & Answers
1

NullReferenceException: Object reference not set to an instance of an object

Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.Object[] args, System.String cacheKeyName, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.SetProperty (System.Object target, System.String name, System.Object value)
WehicleScript.Start () (at Assets/Resources/WehicleScript.js:27)

Effect on this line of script at “vehicle.GetComponent…” below:

function Start () {
	Player = GameObject.FindWithTag("Player"); 		
	mainCamera = GameObject.FindWithTag("MainCamera");
	weaponCamera = GameObject.FindWithTag("WeaponCamera"); 
	vehicleCam.camera.enabled = false;
	vehicle.GetComponent(VehicleControllScript).controlsEnabled = false;
	vehicleCam.GetComponent(AudioListener).enabled = false;
2

If you get error here

 vehicle.GetComponent(VehicleControllScript).controlsEnabled = false;

that means either of two things. Either vehiecle is not initialized and is null or your GetComponent call doesent find VhiecleControllScript and therefore returns null. When you are trying to call controlsEnabled on this null it throws you the error message above.