My mesh needs twice the same material?

[wonkza]

I did a mesh in 3D and made one texture for the all the geometry, everything merged, all the different parts are in the same UV, I deleted the history.

Once I assign the material in Unity it works, but some parts stay without material, and I have to assign the same material to the other part of the mesh.
How do I make it my mesh to only work with one material?

using maya 2016

[Animatics_3D]

Make texture atls and adjust UV in Maya according to texture atlas you will get one material for whole combine mesh