This is with the Ogre Meshes Exporter in Blender, not FeralHeart.
The Ogre Meshes Exporter plugin in Blender works fine for animations and exports the FBody.mesh.xml properly, but whenever I try to export something other than FBody.mesh or CBody.mesh it outputs an xml file containing<mesh>
</mesh>
That can't convert, it's needs bounds defined according to the Ogre Converter program.
I remember it being fixed once before, but I can't remember how I fixed it.
I'm not sure how to post an image using Imgur anymore, but I have a screenshot of the Ogre plugin's configuration.