[Gmsh] Avoid duplicate entities with Geometry.OCCAutoFix = 0

[Juan Córcoles]

Dear gmsh-list,

I have gone through several previous posts in the list archive to find a
way to avoid the creation of duplicate surfaces when building a volume from
a surface loop using the opencascade kernel (assuming I am merging a
stp/igs file). I found that setting Geometry.OCCAutoFix = 0 should do the
trick as I don't care about orientation. However, I am unable to make it
work since the behaviour both with this flag set to 0 or 1 looks the same.
Please find attached a small commented example in case anyone can help me.

Thank you very much in advance,

-- 
Juan Córcoles
http://rfcas.eps.uam.es/juan.corcoles
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