I have been encountering this error because the floor surfaces of my model's 4th floor are not being recognized in OSM:
* Warning * No floor exists in Zone="ZONE-4N10", zone floor area is zero. All values for this zone that are entered per floor area will be zero.
Background info: My model has 4 levels. It is created in Revit, exported to gbxml, then imported to OSM for simulation. . All zones have 1+ spaces in them. All spaces in all zones have floors. The floors for zones on levels 1-3 are recognized by Openstudio but not the floors for level 4 zones. I have tried exporting only the 4th floor and do not encounter this error.
Not sure if this information will be helpful, but in my Revit model, the ceilings are "non-room bounding". This means that the floor is the only bounding element between any 2 stories. Openstudio will recognize the floor of the 4th level and the "ceiling" of the 3rd level as identical but reversed surfaces. However, the 4th level does not recognize any floor surfaces.
Why are these floors not being recognized in Openstudio?
