Animation Graph Error

I am trying to generate animation for people by using Animation Graph introduced by “Animation Graph Overview in Omniverse USD Composer”. I first loaded biped_demo.usd from omniverse://localhost/NVIDIA/Assets/AnimGraph/Characters/NVIDIA/. After that I created an animation graph and added it in biped_demo SkelRoot. However there was a warning “Animation graph ‘/World/AnimationGraph’ is not assigned a valid skeleton” when I ran the animation. Can anyone experienced this problem ?

I believe this means you need to set the ‘/World/biped_demo/Root’ as the skeleton in the AnimationGraph properties. Click on the AnimationGraph in the stage to select it, and in the properties window click ‘Add Target’ and select the SkelRoot in the Skeletal Binding section.