> On 27 Sep 2017, at 09:19, Alessandro Vicini <[email protected]> 
> wrote:
> 
> 
> Hello, I still have some issues when using OpenCascade and Boolean operations.
> For the attached geo file, when I generate the 2D mesh it can be seen from 
> the attached picture that the vertical edge in the front is duplicated (mesh 
> is different on the two sides). To work this out I have to delete one of the 
> lateral surfaces of the box and to reconstruct it.
> Is this an expected behavior, or is it possible to avoid it? Thank you.

Your geometry construction seems a bit convoluted... And indeed to create 
duplicate curves on the boundary of the surfaces.

Quick fix: just "fragment" everything at the end, which will remove the 
duplicates:

s() = Surface "*";
BooleanFragments{ Surface{s()}; Delete; }{}



> 
> A.
> 
> 
> <Test.geo><Mesh2D.jpg>_______________________________________________
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

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