Error while importing gmsh mesh

[dokken]

First of all, please format all code with

```python
#add code here
```

Secondly, you would have to either supply the xdmf-file and the binary h5 file, a pure ascii xdmf file, or the original mesh file, and the functions that have been used to convert it to xdmf.

Also see:

Assigning different physical groups to different color in gmsh and mark them as different material in fenics

Oh that was my bad. I had not read the previous answers. As @dokken mentioned in a previous reply, since you don’t have any facet regions with a physical tag: mvc = MeshValueCollection("size_t", mesh, 1) with XDMFFile("mf.xdmf") as infile: infile.read(mvc, "line") mf = cpp.mesh.MeshFunctionSizet(mesh, mvc) This part of the code would not be required as it is basically reading the tagged boundaries into the object mf using the MeshValueCollection and MeshFunction functions. Please remove …