I made two simple cube (they were adjacent) in Opnestudio then I deleted one of them by delete option in edit menu of the main SketchUp window. At the end when I ran my simulation I got this error:
* Severe * GetSurfaceData: Zone has no surfaces, Zone=THERMAL ZONE 2 * Warning * GetSurfaceData: The total number of floors, walls, roofs and internal mass surfaces in Zone THERMAL ZONE 1
And now I would like to know that how can I fix this error? I have applied the measure of Remove Orphan Objects and Unused Resources but it did not fix it. And I have read this page as well.