I exported my hero with the mecanim way, not baking, just instantiate mecanim to use the animator controller.
I have a problem with the loops of the animations inside a blend tree, I have the "loop" activate and reboot unity, but the loop still not working. I have other loops (idle, walk, run), and these are working, so I think that something is happening with the blend tree.
Somebody is using blend trees in mecanim with Spine characters??
Thanks in advance.
**EDIT: Finally, I've used sub state machine instead blend trees and It works!.