Generating Tessellation using specific shaped domain

[Ameen-Mostafa]

I was wondering if it is possible to generate tessellation using specific shaped domain. According to the official webpage (under tessellation tab), fully custom geometries are possible for the domain

file(<file_name>): a geometry loaded from a Tessellation File (.tess), a Wavefront OBJ file or an OpenVolumeMesh OVM file. If the geometry contains several cells, use cell as described below to extract a cell.

However, I always get a segmentation error. I think it may the results of having curvature (0.7) in the domain smaller than the tessellation (4).
I am really stuck in this issue for three weeks now. I would appreciate any help.
Please find below the code and the domain as txt
neper -T -n from_morpho -dim 2 -domain "sample.obj" -reg 1 -morpho "diameq:dirac(4)" -o trial
sample.txt

[rquey]

This geometry isn't going to work.

The geometry loaded in -domain must be a convex polyhedron / polygon. Then, in principle, you could use -transform cut to insert a crack, but as you said the typical length scale of the crack should be larger than the cell size.

[Ameen-Mostafa]

Thank you for your prompt answer.