i create a groundfloor with 220meters to 150meters.
(first only the 4 walls outside).
next i select plan/export to svg.
but the file is empty.
so i made a test:
i create a new groundfloor with only 4 walls too.
but the wall lenght is only 220 centimeter to 150 centimeters.
next i select plan/export to svg.
and it works.
i get a svg with my floor.