[Spyrosbot]

Im designed a simple classroom with windows and a ventilation system and I am trying to run the geometry with fluent. I am having problems as fluent gives me errors with the components of the design as it doesn't recognise the intersections of the walls?! I am new to the software and don't know much, I am trying to run a simulation of the ventilation system ( 2 inlets and outlets) in a simple classroom in the uk! Any help is much appreciated