SendMessage cannot be called during Awake, CheckConsistency, or OnValidate (mesh: OnMeshFilterChange

Hello,
I'm here because i meet a problem with my program, I've take a program who create a sphere with differents parts as you can see, and the problem is that the material texture are not showed well, it should be grass but there we just see a green side.
in the second image we see that the grass are showed very well, but that only work on a other game object, like an normal sphere, a cube or a terrain.
I've put some images and the codes of my problematic game object.

Thanks by advance.