IndexError: list index out of range

[andrestoga]

I'm getting the following traceback error by only exporting a part I imported to OnShape in parasolid format:

Traceback (most recent call last):
  File "/home/andrestoga/python_venv/onshape_ros/bin/onshape-to-robot", line 11, in <module>
    sys.exit(onshape_to_robot.main())
  File "/home/andrestoga/python_venv/onshape_ros/lib/python3.6/site-packages/onshape_to_robot/onshape_to_robot.py", line 239, in main
    buildRobot(tree, np.matrix(np.identity(4)))
  File "/home/andrestoga/python_venv/onshape_ros/lib/python3.6/site-packages/onshape_to_robot/onshape_to_robot.py", line 203, in buildRobot
    addPart(occurrence, matrix)
  File "/home/andrestoga/python_venv/onshape_ros/lib/python3.6/site-packages/onshape_to_robot/onshape_to_robot.py", line 141, in addPart
    mass = massProperties['mass'][0]
IndexError: list index out of range

Any idea of what's happening?

@Gregwar I can dm you an example so you can reproduce the error I'm having in your side, if you want