Hi @jmirtsch, If interested, i tried to read in @aothms's IFCopenHouse file. I used your '130320 read file.gh' file as a starting point. resultant file [here](https://github.com/OpeningDesign/IFCopenHouse_Pine_Spring/blob/5bf8639080c6eaf8e4396912b0edf64f187fabd4/Native%20Files/IFCopenHouse_GeometryGym_read_IFC.gh) Perhaps i'm missing something. 
