Object2Terrain Error

I am using the Object2Terrain script. However when I try create a terrain based on a circular mesh the terrain created is always square shape and this error appears.

Expanding invalid MinMaxAABB
UnityEditor.DockArea:OnGUI()

and

Invalid AABB result
UnityEditor.DockArea:OnGUI()

Thanks in advance for any help.

Unity does not support any other terrains therein square.

The MinMaxAABB is because a script has probably created a not valid bounding box for the object.

Terrains are always square, since they’re stored as a 2d heightmap.