```
Exception ignored in: <bound method MbsVtkOutputter.__del__ of <mbs_vtk.MbsVtkOutputter object at 0x7f3ba325b390>>
Traceback (most recent call last):
  File "mbsysc/MBsysC/build/python/mbs_vtk.py", line 127, in __del__
AttributeError: 'NoneType' object has no attribute 'MbsVtkOutputter_destroy'
```