Hello (When my McAfee virus program is updated, it sees bv.rpt as a threat. (by giving Real Protect-SS! error) when I restore, I will delete the .exe after 10 seconds.) For this, I fixed the project with the demo program. My suggestions --I put columns on the sides of the curtains, --I made changes in the attic, (remove the middle curtain to the roof if you want) --Some tiles were deleted while adding the columns, --I fixed the B errors, In this case, the output is taken. --You can remove the attic wall loads and reduce the moving loads. --Make a solution with the ladder Unver ÖZCAN