Missing component when saving as a dxf file

When I save the following file as a dxf, the layer “seat cushion” and its components disappear. Anyone know why?

manufacturer drawing.3dm (2.4 MB)

When I used SaveAs and the default export scheme, Rhino warned me one object was skipped and said to look at command history (F2).
I did and saw one BREP was skipped.

I ran SelBadObjects and the seat cushion was selected.

It looks like the best fix will be cleaning up the modeling for the top curved surfaces for that object. Eliminate the tiny surfaces and make a single surface that fits better.

Ok, I’ll see if I can find out why it’s a bad object. Thank you John.