Hello,
Please use a neutral CAD format like .stl or .step or parasolid. Please try this and if you are still seeing errors, please create a separate question under the Pre and Post Processing thread on this community. Also, try to import your geometry to SpaceClaim, which is another Geometry tool we have.
Worst case - you could always create the geometry from scratch in SpaceClaim or Design Modeler.
Hope this helps.
Thank you.
Best Regards,
Karthik