[Gmsh] Problem saving a 1D mesh with groups

DILASSER Guillaume Guillaume.DILASSER at cea.fr
Thu Mar 9 08:26:16 CET 2017

Hi Miguel,

The explanation is in Gmsh doc there : http://gmsh.info/doc/texinfo/gmsh.html#Elementary-vs-physical-entities. When you save a mesh, if at least one Physical group is defined, then only those get saved, otherwise the whole mesh is saved. Therefore, I think you are missing the definition of a Physical line for the line that connects your Physical points, resulting in you only saving the endpoints.

Sincerely yours,

Guillaume DILASSER
Doctorant SACM / LEAS
CEA - Centre de Saclay - Bât.123 - PC 319c
91191 Gif sur Yvette Cedex - France -

guillaume.dilasser at cea.fr<mailto:guillaume.dilasser at cea.fr>

-----Message d'origine-----
De : gmsh [mailto:gmsh-bounces at ace20.montefiore.ulg.ac.be] De la part de Miguel Segade
Envoyé : mercredi 8 mars 2017 18:28
À : gmsh at onelab.info
Objet : [Gmsh] Problem saving a 1D mesh with groups


I'm trying to create some groups and a 1D mesh with gmsh.  I import the mesh from an .iges file and then I create the groups (Physical Points).

After that I create the 1D mesh and everything seems ok, the problems is when I save it, only a cople of nodes and elements show in the mesh. If I mesh it without defining the groups, all the mesh is correctcly saved.

Is this a bug? I'm doing something wrong?

This are the files:

IGES geometry: http://pastebin.com/9becZhXH GEO file: http://pastebin.com/AVbUMNcs Resulting mesh without groups: http://pastebin.com/Ez58LxxT Resulting mesh with groups: http://pastebin.com/7LKsFrPP



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