File "C:/Users/ashfa/AppData/Roaming/Autodesk/Autodesk Fusion 360/API/Scripts/URDF_Exporter\core\Joint.py", line 176, in make_joints_dict joint_dict['child'] = re.sub('[ :()]', '_', joint.occurrenceOne.name) AttributeError: 'NoneType' object has no attribute 'name' about fusion2urdf HOT 1 OPEN

Could be due to many reasons. General problem solving that I figured out after much trial and error:

1. Get the latest version of the exporter
2. Re-check the joint creation order (which component is the parent and which is the child... in README)
3. Check the names of the joints:
   If the joint names are "Joint 1" change it to "joint_1" (remove spaces and make 1st letter lower case, replace spaces with
   underscores)
4. Check the names of the links:
   If the link names are "Link 1" change it to "link_1" (remove spaces and make 1st letter lower case, replace spaces with
   underscores)
5. Create a milestone before using the exporter (revert model back to this if export failed)
6. For complex joints, kinematic loops, etc, follow this README file (It is a fork of trial and error and constant iterations that I have created for my own project)
7. Finally before URDF export, click on " DO NOT CAPTURE DESIGN HISTORY "
   Close the issue if this solves the problem

from fusion2urdf.