I tried those commands that you passed me, saving the file also changing the acis version, by default and 70 then I put 40 and then 30.
but when I open it with catia v5 it gives me error:
"No valid data. no associated editor."
what I mean and import it into the cat as if it was an iges file, but I don't know if by autocad it is possible to do something like that.
i.e. practically see the same solid that I generated with autocad also in catia v5.
even if it does not generate the tree with the features, that is with all the processing, to me it is okay the same.
verify compatibility with stl files that are native to autocad and since it sees them swx should most likely see them catia. for export different from stl I have no idea why I never did it with autocad since I left it years ago