MissingMethodException: Method not found: 'UnityEditor.EditorApplication.add_hierarchyChanged'.

[AmazingPunk]

Hey folks,

Has anyone come across this error when creating a new behavior tree?

MissingMethodException: Method not found: 'UnityEditor.EditorApplication.add_hierarchyChanged'.
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for BehaviorDesigner.Editor.GizmoManager
System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor (RuntimeTypeHandle type) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.CompilerServices/RuntimeHelpers.cs:101)
UnityEditor.EditorAssemblies.ProcessEditorInitializeOnLoad (System.Type type) (at C:/buildslave/unity/build/Editor/Mono/EditorAssemblies.cs:136)

I'm using both the latest version of Behavior Designer and Movement pack and Unity 2017.4.10f1

Thanks

 

[Justin]

Did you recently update Unity? You are likely using a version built for a prior Unity version. If you remove the Behavior Designer package from the Asset Store cache location and then download it again you'll get the right version.

 

[AmazingPunk]

@Justin Thanks! that's done it! Sheesh, sometimes I just don't think