[Gmsh] Problems for meshing around a cavity

[Durufle marc]

Hi,
I joined the geo file I am considering, which consists of a parallepiped box and a piano-shaped cavity (I want to generate
 a tetrahedral mesh between those two surfaces). With an old version of gmsh (2.0.8), this geo file works fine, it generates the mesh,
 so it is great. But with this old version, I don't have fourth order available for tetrahedral elements :(
With the new version (2.4.2), it gives the following output error :

Error   : No tetrahedra in region 1 0

Do you have an idea about that problem ?


      
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