Hi, I am working on the topology optimization of an airplane hinge for a project and I have a problem.After completing all the specifications (goals and constraints, fixtures, etc) and performing the meshing I get the attached optimization.

The problem comes at the time of saving the file, since once created a smoothed mesh I try to export it and "disappears" the visualization of the mesh. Still I save it with the new part file configuration, and export solid.

When I accept to export the mesh I get the following error:

Does anyone know if I'm doing anything wrong or could you help me? Thank you