Rebuild mesh with different structure

I am currently facing a a difficulty generating a symmetric mesh from a symmetric open polysurface.

Here are the steps I follow:

  1. I generate a mesh from the existing surface. The geometry of the surface is symmetric so I would expect to get a symmetric mesh structure. However, this is not the case. The mesh is non-symmetric with some bad quality elements generated.

  2. I use the “Rebuild mesh” tool to improve the quality of the mesh, but the mesh coordinates are retained and the mesh structure doesn’t change significantly.

Any help will be much appreciated. Thanks.

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