RuntimeError: out of range index raised from method Compute of class ShapeTesselator

[paihui]

I test the code from core_tesselator_unittest.py and I try to test my file, I keep getting the following runtime error: Standard_OutOfRangeNCollection_AliasedArray::value(), out of range index raised from method Compute of class ShapeTesselator. It does not seem to be coming from my code. I have no idea how to fix it or check it.

You can find my code below and the full terminal output

• my test code

• terminal output

ERROR: test_tesselate_STEP_file (main.TestTesselator) loads a step file, tesselate. The as1_pe_203 contains

Traceback (most recent call last): File "d:\pythonocc-core\test\core_tesselator_unittest.py", line 129, in test_tesselate_STEP_file stp_file_tesselator.Compute(compute_edges=True) File "C:\Anaconda3\envs\py3d\lib\site-packages\OCC\Core\Tesselator.py", line 250, in Compute return _Tesselator.ShapeTesselator_Compute(self, compute_edges, mesh_quality, parallel) RuntimeError: Standard_OutOfRangeNCollection_AliasedArray::value(), out of range index raised from method Compute of class ShapeTesselator

---

Ran 8 tests in 1.324s

FAILED (errors=1)

[tpaviot]

Can you please provide the stp file you used for your test

[paihui]

I used two files for my test, one is as1-oc-214.stp in pythonocc-core/test/test_io/. test.zip

[ChristophNa]

The same problem occurs for pythonocc-demos/examples/core_webgl_STEP_to_X3D.py and pythonocc-demos/examples/core_webgl_x3dom_bigfile_multipleshapes.py

RuntimeError: Standard_OutOfRangeNCollection_AliasedArray::value(), out of range index raised from method Compute of class ShapeTesselator

I used the step files provided in the repository. I used the following version: pythonocc-core 7.7.0, python 3.9.16

[wrxsky]

I also get the same error when running "load_step_ap203_multiple_shapes.ipynb" in /jupyter_notebooks. With pythonocc-core 7.7.0, Jupyter Notebook 6.5.4 and Python 3.10.10.

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Cell In[22], line 6
      3 for solid in t.solids():
      4     # random colors, just for fun
      5     random_color = format_color(randint(0,255), randint(0,255), randint(0,255))
----> 6     my_renderer.DisplayShape(solid, shape_color=random_color, render_edges=True)

File ~\Miniforge3\lib\site-packages\OCC\Display\WebGl\jupyter_renderer.py:788, in JupyterRenderer.DisplayShape(self, shp, shape_color, render_edges, edge_color, edge_deflection, vertex_color, quality, transparency, opacity, topo_level, update, selectable)
    786         output.append(result)
    787 else:
--> 788     result = self.AddShapeToScene(
    789         shp,
    790         shape_color,
    791         render_edges,
    792         edge_color,
    793         vertex_color,
    794         quality,
    795         transparency,
    796         opacity,
    797     )
    798     output.append(result)
    800 if selectable:  # Add geometries to pickable or non pickable objects

File ~\Miniforge3\lib\site-packages\OCC\Display\WebGl\jupyter_renderer.py:874, in JupyterRenderer.AddShapeToScene(self, shp, shape_color, render_edges, edge_color, vertex_color, quality, transparency, opacity)
    861 def AddShapeToScene(
    862     self,
    863     shp,
   (...)
    871 ):
    872     # first, compute the tessellation
    873     tess = ShapeTesselator(shp)
--> 874     tess.Compute(compute_edges=render_edges, mesh_quality=quality, parallel=True)
    875     # get vertices and normals
    876     vertices_position = tess.GetVerticesPositionAsTuple()

File ~\Miniforge3\lib\site-packages\OCC\Core\Tesselator.py:250, in ShapeTesselator.Compute(self, compute_edges, mesh_quality, parallel)
    248 def Compute(self, compute_edges: "bool"=False, mesh_quality: "float"=1.0, parallel: "bool"=False) -> "void":
    249     r"""Compute(ShapeTesselator self, bool compute_edges=False, float mesh_quality=1.0, bool parallel=False)"""
--> 250     return _Tesselator.ShapeTesselator_Compute(self, compute_edges, mesh_quality, parallel)

RuntimeError: Standard_OutOfRangeNCollection_AliasedArray::value(), out of range index raised from method Compute of class ShapeTesselator