Error running DAGMC's CAD-Based Geometry in OpenMC

[LesegoM]

Good day,

I am novice DAGMC-OPENMC user and is my first time using this forum. I have been trying to run the attached example from the OpenMC NEA-OECD workshop without success. I get the error message in the following cell of the notebook and cannot figure out what could be the source. See error message below.

I also tried sharing the notebook, but it looks like is not supported. Please advice. Thank you very much for your assistance.
CAD.ipynb

The Error is listed below:

---

RuntimeError Traceback (most recent call last)
Cell In[23], line 4
1 # Ensure all required XML files exist before plotting
2 teapot_model.export_to_xml()
----> 4 teapot_model.plot(
5 basis='xz',
6 origin=(0.0, 0.0, 0.0),
7 width=(30.0, 20.0),
8 pixels=(450, 300),
9 color_by='material',
10 colors={iron: 'gray', water: 'blue'}
11 )

File ~/anaconda3/envs/openmc-env/lib/python3.12/site-packages/openmc/model/model.py:954, in Model.plot(self, origin, width, pixels, basis, color_by, colors, seed, openmc_exec, axes, legend, axis_units, outline, show_overlaps, overlap_color, n_samples, plane_tolerance, legend_kwargs, source_kwargs, contour_kwargs, **kwargs)
951 self.plots.append(plot)
953 # Run OpenMC in geometry plotting mode
--> 954 self.plot_geometry(False, cwd=tmpdir, openmc_exec=openmc_exec)
956 # Read image from file
957 img_path = Path(tmpdir) / f'plot_{plot.id}.png'

File ~/anaconda3/envs/openmc-env/lib/python3.12/site-packages/openmc/model/model.py:1150, in Model.plot_geometry(self, output, cwd, openmc_exec, export_model_xml, **export_kwargs)
1148 self.export_to_xml(**export_kwargs)
1149 path_input = export_kwargs.get("path", None)
-> 1150 openmc.plot_geometry(output=output, openmc_exec=openmc_exec,
...
122 error_msg = 'OpenMC aborted unexpectedly.'
123 error_msg = ' '.join(error_msg.split())
--> 125 raise RuntimeError(error_msg)

RuntimeError: OpenMC aborted unexpectedly.
Output is truncated. View as a scrollable element or open in a text editor. Adjust cell output settings...