Unver brother, first of all, thank you very much for taking your Sunday and correcting my project. You are not paid in this forum. By the way, I missed a situation bro. The ladder will rise from the right side in an L shape. right in the corner is the landing, and then it will rise from there and sink into the floor. When I lay the complete flooring on the left side of the curtain group, I get the same errors again. I wouldn't want to tire you out twice, brother, but I'm still encountering errors that I couldn't solve just now.