hello stl file format depicts only surfaces (with triangular elements) https://en.wikipedia.org/wiki/STL_(file_format) no wonder you are struggling to produce a volume mesh try to export as step
jean pierre aubry -- jean pierre aubry jeanpierre[at]lamachine.fr 33 688 670 795 _______________________________________________ gmsh mailing list gmsh@geuz.org http://www.geuz.org/mailman/listinfo/gmsh
