FEM: Gmsh throws "list index out of range" error when a shape is below the FEM Analysis container

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FEM: Gmsh throws "list index out of range" error when a shape is below the FEM Analysis container #13364

Open FEA-eng opened 5 months ago

FEA-eng commented 5 months ago

Is there an existing issue for this?

[X] I have searched the existing issues

Problem description

As mentioned in #13360, Netgen works fine when a shape to be meshed is located below the Analysis container in the tree while Gmsh fails in such cases with the following error message: list index out of range

Full version info

OS: Windows 10 build 19045
Word size of FreeCAD: 64-bit
Version: 0.22.0dev.36784 (Git)
Build type: Release
Branch: main
Hash: d1930fc7e6fc35c413f9f39d22f2ea28fca827c7
Python 3.11.8, Qt 5.15.13, Coin 4.0.2, Vtk 9.2.6, OCC 7.7.2
Locale: Polish/Poland (pl_PL)

Subproject(s) affected?

FEM

Anything else?

No response

Code of Conduct

[X] I agree to follow this project's Code of Conduct

marioalexis84 commented 5 months ago

@FEA-eng, I can't reproduce it. Could you provide the steps?

FEA-eng commented 5 months ago

@FEA-eng, I can't reproduce it. Could you provide the steps?

It seems that it may depend on what's in the tree. Try this:

add Part Cube
add the Analysis container and Gmsh mesh, material, fixed BC and force load anywhere - everything works so far
add Part Cylinder and make Part Cut on both shapes (select the cube first) - now geometry will be below the Analysis container
delete Gmsh mesh and try adding a new one - it should fail with that error while Netgen will still work

If it still doesn't happen for you then it might be OS-specific.

Gmsh_failure.zip

marioalexis84 commented 5 months ago

I guess you have mesh groups for reference shapes enabled in Fem preferences. I had already noticed that problem. I have it on my to-do list.

FEA-eng commented 5 months ago

I guess you have mesh groups for reference shapes enabled in Fem preferences. I had already noticed that problem. I have it on my to-do list.

Yes, I do. And it seems that it works without it. Good to know that you already have it on the radar.