I have a problem with this model with the error message in the title. The armature won’t deform the mesh. I made the hands seperately from therest of the model then joined them. Are they messing up the model or is it the subsurf modifier that i applied earier?
I tried:
recalculating normals
removing dup vertices
turning off deforms for the ik bones
you have horrid topology around the face. Select the mesh, go into edit mode, with NO vertices selected, press Spacebar, type in “Manifold”. Click on the “select non-manifold” option. This will show you where your problem is.