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

Questions & Answers
1

When i run the game and when i click the 3d test give gives me this error message:

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)
Menucode.OnMouseExit () (at Assets/Menucode.js:10)
UnityEngine.SendMouseEvents:DoSendMouseEvents(Int32, Int32)

This is the code for the file

function OnMouseEnter()
{
     //Change color 
	renderer.meterial.color = Color.green;
}

function OnMouseExit()
{
     //Change color 
	renderer.meterial.color = Color.white;
}

How do i fix it

2

It’s material, not meterial.