Geometric issue

Can somebody tell me what’s the geometric fault here and how to solve it?

Hi there, it is important that all of the parts are solid (no sheet).

Would it be possible that you export your model to STEP or Parasolid?

Best regards,

Ok, I’ll try these extensions. Thanks.

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Is SOLIDWORKS a good tool to achieve what you’ve told me?

And FreeCAD too.

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Nevermind, I’ve deleted the ground and smoothed the surface and it worked!

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