Comment 12 for bug 1434721

Can you print from that application to PDF? Inkscape might be able to pull most of what you want out of that.

Rather than having us go on suggesting one file type at a time, let's just cut to the heart of the matter. The thing you need to do is to look at all the Inkscape Open types, and at the Autocad (or whatever this is) export/print types, and try all the types they have in common until you find one which works.