Multiple NullReferenceException

I am trying to generate NavMesh graph.I am getting the following errors:

NullReferenceException: Object reference not set to an instance of an object
Pathfinding.NavMeshGraph.OnDrawGizmos (Boolean drawNodes) (at Assets/AstarPathfindingProject/Generators/NavMeshGenerator.cs:778)
AstarPath.OnDrawGizmos () (at Assets/AstarPathfindingProject/Core/AstarPath.cs:531)
UnityEditor.DockArea:OnGUI()

What is this and how can I solve it?

What version are you using?

Version of what,Unity?

Unity is 4.2

Hmm…Probably this is the reason? “The automatic generation is only available in the pro version and is described later in this tutorial”

Hi

No, I mean what version of the A* Pathfinding Project.
The NavmeshGraph doesn’t use automatic navmesh generation, it is the Recast graph which uses does that.

I downloaded the latest one a couple of days ago.

Well, then I have no idea. Could you describe exactly the steps you take to get that error?

I just create a new Graph of navmesh type.Pass some mesh into it.Btw,tried different types of meshes,even Unity3d plane.Then press “scan”.This error pops up.For the Grid Graph it all works all right.