Hi Guillaume, Matthias and Paul.I found the file .gmsh-options and I removed 
it. I think that I saved it accidentaly and I did not know that I had it.
Now I have only triangles in the mesh. So the problem is solved.
 Thank you.Regards.

    El Martes, 11 de julio, 2017 5:00:45, DILASSER Guillaume 
<[email protected]> escribió:
 

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4;}#yiv1323071527 filtered {panose-1:2 4 5 3 5 4 6 3 2 4;}#yiv1323071527 
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p.yiv1323071527MsoNormal, #yiv1323071527  li.yiv1323071527MsoNormal, 
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div.yiv1323071527WordSection1 {}#yiv1323071527 Hi César,    Do you have defined 
a Gmsh option file (.opt) either directly for your .geo file or globally ? If 
so, check that this file does not have an option forcing Gmsh to use quads, 
like for example Mesh.RecombineAll = 1 ;. To me, that is the only thing that 
can be happening because, by default, your .geo should give you a triangular 
mesh…    Sincerely Yours,    Guillaume DILASSER Doctorant DACM / LEAS CEA - 
Centre de Saclay - Bât.123 - PC 319c 91191 Gif sur Yvette Cedex - France -    
[email protected]    De : gmsh 
[mailto:[email protected]]De la part de Zenker, Dr. 
Matthias
Envoyé : mardi 11 juillet 2017 09:46
À : 'César Pablo Camusso' <[email protected]>; [email protected]
Objet : Re: [Gmsh] Mesh 2d surface only with triangles.    Hi,    I cannot 
reproduce it. I open the geo with the GUI, click on Mesh->2D and get a 
triangular mesh.    Matthias       Von: César Pablo Camusso 
[mailto:[email protected]]
Gesendet: Dienstag, 11. Juli 2017 00:14
An: [email protected]
Betreff: [Gmsh] Mesh 2d surface only with triangles.    Dear partners, I want a 
mesh with only triangles, but I get also quads. It is a 2d geometry. How can I 
force gmsh to use only triangles? I have attached a geo file as example. 
Regards.    
Erbe Elektromedizin GmbH Firmensitz: 72072 Tuebingen Geschaeftsfuehrer: 
Christian O. Erbe, Reiner Thede Registergericht: Stuttgart HRB 380137 

   
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