Robot's right thigh follows bones correclty, but left thigh does not. File attached.

Arrrrgh! I can’t figure out what is different between the two legs, the right leg is correct, but the left thigh doesn’t follow the bone–as if the weight is set too low, but I don’t think it is.

File attached, if anyone can help, I’d appreciate it. Kinda pulling my hair out.

Thank you for any suggestions.robot rigged no (10.7 MB)

Put your mesh in edit mode, tick show weights in mesh display and select a few vertices. You will see thigh only on right and thigh and hip on left. So you are averaging your weights on the left side.