So I’ve been rooting around trying to solve this one for a couple of hours now and I just can’t seem to get my lamp armature to grab the Front Upper Arm of my lamp.
I have deleted and recreated the arm’s vertex group
renamed the group and/or bone both with and without using Copy&Paste
Deleted the Armature Modifier and recreated it
Restarted Blender
Stared at the screen in utter bafflement and befuddlement
walked away for 15 minutes then repeated all the above
if someone could please help by pointing me at the problem It would be greatly appreciated!
Here is my .blend file (hosted on DropBox)