There is a maximum size for the amount of territory covered in a floor plan. The maximum diagonal(line drawn from the bottom-left corner to the upper-right corner) is 1000 meters. If you scale the floor plan beyond a 1000 meter limit, regardless of the image size, the RF Modeling Engine crashes and generates an error message: Design bounds exceeding maximum design area.
Note
The maximum total amount of territory (real estate) for a scaled floor plan is determined by a diagonal line from the two furthest corners of the diagram. This line can be no longer than 1000 meters (3280 ft.) For a perfectly square floor plan, this represents a single side of no greater than 707.1 meters (2320 ft.) and a total area of 50,000 sq meters (538,196 sq ft.)