Hi, please do you know where is the problem? I imported the scan of the real plan ground floor and built the wals. In the first floor I can also move with the wals from the ground floor and it is wrong. I can´t cath the walls from the first floor properly, they mix together with the ground walls. When i did floors withhout the imported backround of the plan, its ok. In every floor I can move only with the walls, which are built on the concrete level.

Thank you for any idea!