[Gmsh] ERROR: Edge ### - ### multiple times in surface mesh

[Sangpil Yoon]

Dear members,

I 've got the ERROR ==>  ERROR: Edge 100 -150 multiple times in surface mesh

when I used "Frontal" for 3D meshing on my geometry

            Mesh.Algorithm3D = 4; // (1) Delaunay (default) (4) Frontal

while Gmsh finished a 3D meshing with default option, "Delaunay."

it seems like i have duplicate edges in my geo but how to find it?

how come it is not a problem when 'Delaunay' is used for the 3D meshing?


Any comments?
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