Error Displayed on Editor...

If any one could help me in understanding this.

 

This usually occurs when you add a rigidbody component to a mesh that is not a completely enclosed volume. This can be because the mesh was intentionally designed that way (eg, a flat plane) or because there is a missing polygon in the mesh. If the mesh is intentionally open, but still needs a rigidbody, you can set the value yourself from the script with the inertiaTensor property:-

Code (csharp):

1. rigidbody.inertiaTensor = new Vector3(1, 1, 1);