The import does take a while. You get the dot until Archicad can generate the plan view. Usually.
Unless, as in your case, there's a problem with the code in line 2. You should have received a message during a 3D view generation.
So fickle Archicad dislikes your object code.
I was able to bring it thru via Cinema 4D that is more tolerant of irregularities but did not correct the axis. Only have Archi16 installed right now.
Dwight Atkinson