Cinema 4D 11.5 - Weights are not exporting?

I’m trying to export a mesh from Cinema 4D 11.5 which is weighted to a joint.

I have tried the following:

exporting as fbx 2010, and fbx 6
exporting directly from the c4d file
converting to bones, then repeating the above (this removes the weights in cinema 4d for some reason)
converting to bones, repainting the weights, then exporting as above.

All of these lead to the same result… All vertices are weighted 100% to the root bone.

What’s going on?

So… it turns out that weights do not import properly from FBX when they are solely attached to the root bone. In order to get proper importing of skins, you must create at least one child bone and skin/weight the mesh to that.

Hope this helps somebody.