How do I locate this error about Network Transform?

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InvalidOperationException: transformSyncMode set to SyncRigidbody3D but no Rigidbody component was found, did you call NetworkServer.Spawn on a prefab?

Do I really have to go through all my gameObjects to see where is it that I try to sync a RigidBody, on a game object that doesn’t have a RigidBody? or does it also mean something else??

If you press clic on console error message, should be get a signal on your hierarchy , on gameObject causing the problem.

follow this link, maybe you can solve the problem.
link text
Prefab was checked as inactive so it couldn’t find rigidboy.