Hi Roger
That error is coming from (Doors + Windows), yes.
It's hard to say why it's happening though - we'd need to have a look at a MOD or PLN of it to be able to figure out how to fix it.
Could you just send an email to us at
support@cadimagegroup.com, and we will follow it up from there.
Josh Osborne - Central Innovation
HP Zbook Studio G4 - Windows 10 Pro, Intel i7 7820HQ, 32Gb RAM, Quadro M1200