Thank you for the help! I attempted your suggestion by editing the wrapping in the GUI. After going through the XML again, I realized that the SUP Wrap Object didn't have a corresponding WrapCylinder within the Body tags under the Radius WrapObjectSet. I found many other muscles that were copied ove...

I copy and pasted muscles from an upper extremity model to the existing Wu Shoulder Model. The first few muscles in the list don't give any errors and are visualized in the GUI. The error I get below in the GUI is with the Supinator or SUP muscle in the file. I have not been able to figure out how t...