I am testing out bringing a Revit MEP model in gbxml format to GBS and then to eQuest. I get an error saying that:
There are issues with this gbXML file.

"A significant number of horizontal surfaces (floors and/or ceilings) appear to be missing from this gbXML file. The total horizontal area (278 m2) should be approximately equal to the building area (813 m2). Running this file through GBS would produce meaningless results. We suggest you review your model for completness, and if you need further assistance submit your model on our Support page."

This is most likely connected to why when I bring the model into eQuest that the floors do not show up (except for the very bottom floor). When I build the model, I just build walls, a roof, and the floors. I don't join the elements or anything. Should I be? I'm not really familiar with how to build a building or using Revit Architecture.

Thanks