Missing elements output
The following file creates Physical Surfaces and Physical Curves with arbitrary locations. The Physical Curves may be embedded into more than one Physical Surface. Using the Boolean operations the meshes of the curves match the meshes of the surfaces and any duplicate nodes are removed. The GMSH graphic user interface works perfectly. The physical groups are displayed correctly when I select each independently. The problem is that not all elements are exported to the .msh file. My understanding is that this is caused because the Boolean operations re-create some of these physical groups. Is it possible to force GMSH to export to the .msh file the missing elements? Would this problem have been avoided if I had used the API? Aris Example_4.geo