Saving human template wont work

I am setting up a humanoid character in Mecanim, I placed all my bones in their appropriate slot and I saved my bone mapping to a template in order to apply it to a multitude of characters that have an identical bone structure!

when the time comes to load the template, nothing happens… if i clear my characters mapping, just to make sure i start form fresh, all it dose is map my hip bone (root).

this tool has never worked for me, but nobody else seams to have had this problem. Thing is, i don’t have the luxury of doing all the mapping by hand, I have way to many characters to do. Is there something I am missing? maybe a work around?

Saved human templates have hard time loading yes.
But you can instead do the exactly same thing with: Humanoid → Copy From Other Avatar