[kem]

Hello
I am trying to create an STL from a STP file using the following options.
# surface meshing algorithm
gmsh.option.setNumber("Mesh.Algorithm", 6) # Frontal-Delaunay for 2D meshes

# refinement based on curvature
gmsh.option.setNumber("Mesh.CharacteristicLengthFr omCurvature", 1)
gmsh.option.setNumber("Mesh.MinimumElementsPerTwoP i", 36)

# refinement based on edge lengths
gmsh.option.setNumber("Mesh.CharacteristicLengthMi n", 0.1)
gmsh.option.setNumber("Mesh.CharacteristicLengthMa x", 10)

I have adjusted the CharacteristicLengthMax from 25 to 10, but this showed no reduction in conversion time.

The factor that most effected the conversion time was MinimumElementsPerTwoPi. Halving it from 72 reduced the conversion time by 60% for most of my stp files, however, it resulted in failures for some.

The error message reported is "Impossible", and the conversion hangs.

Does anyone have any suggested settings for gmsh to optimise conversion, or maybe some explanation of the error message?