Im in MED, trying to connect a bone to about 6 vertices at the end of an arm in my model. I go into "Apply Vertices Mode", select the bone and the vertices and when I click the "Apply Vertices" button it doesnt do anything. The vertices stay yellow. The manual says they should go white.

If I draw a simple cube some distance away from the rest of the model and a single bone inside the cube and then try to link the vertices of one face to the end of the bone it works fine.

Can anyone tell me what I'm doing wrong?