Elements from Openbuildings in Pro Concrete


I've constructed a house in openbuildings designer (connect edition, update 5) and would like to add rebar to the concrete parts in pro structure, connect edition update 3. 

Does pro concrete don't detect openings in slabs, walls or beams created in OBD? 

I've created some new walls and slabs in ODB, not included in the delivered dataset. Seems there's a problem with adding rebars to those sometimes? Could it origin from me creating my own walls? 
Why else would pro concrete say that my slab is "element not valid for tool" while I try to add slab reinforcment to it?