1. Run character thorugh accu rig
2. Export it (I used Maya in this case)
3. Open it in Maya
4. Look At screenshots

Actual Result:
Duplicated meshes with names: V_None, V_None1,....
'
Expected Result:
Just the right character on screenshots. No extra meshes.

Edit: It looks like it's something with "Morph target / Blendshape"

Greets Phil