<div>Hi,</div><div><br></div>There is a bug in gmsh for the attached geometry. If you make a 1D mesh, save this mesh to a file, and then reload the saved mesh it will differ from the original mesh. Specifically line l1 (12) will incorrectly be connected to nodes p1 (1) and p3 (3), instead of p1 (1) and p2 (2).
<div>When increasing the mesh density, the problem persists, the whole of l1 will disappear. Hope this can be fixed or you can provide a work-around. Best regards,</div><div><br></div><div>Jasper</div>