[Gmsh] Problem of non coherence.

[Olivier Allain]

Dear sir,

 I am a new user of gmsh. This tool is very smart and easy to use. I
thank you for your effort. I have a question with a problem of
coherence between two surfaces. It appears in 3D using a extruded zone
 and an unstructured zone. If you look at the boundary between the
center and the external circle it appears the mesh is not conform. It
seems the mesh generate 2 volumes without taking into account there is
 a common face. It runs with Netgen but it crashes with Tetgen, and
Netgen seems to be not able to run for a big case. Is there an option
for Tetgen in order to solve this problem ?

 Best Regards,
 O. Allain
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