Description
The Load Roofs parameter was checked, but no roof elements are present in the Input Floorplan Polygon Layer parameter value.
Solution
Rerun the Extract BIM File Floorplan tool with the Roofs option enabled to ensure roofs from the input IFC file are created in the Floorplan Polygon layer.
If no roofs are present in the input IFC file, no action is necessary. The tool will import levels based on slab elements in the input IFC file.