Nav Mesh build problem

Anyone know what’s going on? I dont have any hidden objects in the scene.

Thanks.

Are those static meshes or BSP/Geometry brushes? THey look like they may be the latter.

Is this only happening in this level/project or can you recreate this in a new project as well? If so, can you detail the steps to reproduce the issue?

What version of the engine are you currently using? 4.4.0, 4.4.1?

Thank you!

BSP. I created the Nav Mesh a couple of times and it still had that error. Creating a new project worked fine. As soon as I closed down Unreal and re-oped the scene above, it displayed the Nav Mesh correctly. Now everything seems to be fine.