Exported Archicad DWG files can create problems for laser cutting in my experience cutting artwork, graphics and text through sheet metal.
It seems to have something about the DWG export not totally joining lines…
The machine operator complains about the machine seeing small segments and the start/stop time. It gets expensive since the machine slows down.
My solution is to create fills with the magic wand, then convert the fill edges to DWG. This maintains continuity.
Of course, your experience may be better since my last time doing this was five years ago, but worth checking out.
Dwight Atkinson