[Gmsh] Double elements

[Romain PORCHEZ]

Hi every body,

I am currently trying to mesh a structure made of surface elements mainly.

I'm using extrusion to generate a structured mesh and evrything works 
fine, but:

When i'm running my study, it tells me that my model contains many double 
elements (elements built on the same nodes actually).

I have read my file many times but can't figure what the probleme is ( i 
think about the extrusion, but can't be sure)

I attache my file :



Any help is welcomed !

Thanks in advance

Romain PORCHEZ
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