[Gmsh] Periodic Surface Error: Different number of points for periodic correspondance between surfaces.

lucia.cobian lucia.cobian at imdea.org
Wed Jul 22 12:26:44 CEST 2020

Dear all,

I am trying to build a periodic mesh for a complex geometry, made by 
cylinders, which is bounded by a cube (Boolean intersection). To do the 
periodic mesh I have used Periodic Surface {} = {} Translate {} command 
to make it periodic in the three opposite surfaces (xy,xz,yz) of the 
intersected cube, as indicated in the attached .geo file.

However, I receive the following errors:

“No  corresponding point x for periodic connection of surface xx to yy” 
or “Different number of points (a vs b) for periodic correspondence 
between surfaces aa and bb”.

I have tried to fix the error without any success. I would like to know 
why is this happening and how can the .geo file be modified to fix the 

I would appreciate if someone could help me with this issue.

Thank you very much,

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