Assets/NGUI/Scripts/Editor/PropertyReferenceDrawer.cs(169,55): error CS0122: `UnityEditor.EditorGUIUtility.labelWidth' is inaccessible due to its protection level
NullReferenceException
UnityEngine.Material..ctor (UnityEngine.Shader shader) (at C:/BuildAgent/work/e32e3436d0e48bd0/Runtime/ExportGenerated/WiiUEditorExtensions/Graphics.cs:1684)
UIAtlasMaker.OnGUI () (at Assets/NGUI/Scripts/Editor/UIAtlasMaker.cs:734)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Applications/buildAgent/work/c514da0c8183631c/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)