Compute mesh inertia tensor failed with AddChild

[vikti]

I have some exceptions that I don't understand.

1. Actor::updateMassFromShapes: Compute mesh inertia tensor failed for one of the actor's mesh shapes! Please change mesh geometry or supply a tensor manually!
2.  

This is thrown by :

1. MapUIRoot = Resources.Load("Components/com_map/Views/Templates/_mapUIRoot") as GameObject;
2. GameObject MapLayer  = Resources.Load("Components/com_map/Views/Templates/_mapLayer") as GameObject;
3.  
4. MapLayer = NGUITools.AddChild(gameObject,MapLayer);

How can I solve this ?

[ArenMook]

Sounds like you have an object there that uses a custom mesh collider that is not fully enclosed. Stick to non-mesh colliders.

[vikti]

It was due to the fact that I parent a non NGUI object (it is a OnlineMaps plugin, which display a googlemap) which does not like at all the scale manipulations.
I solve the probleme by parent it outside the actual UIRoot.
Thx