As a result of the ANALYSIS, the r coefficient is greater than 7, but the system says there is a curtain, I just entered the basement curtain and defined it as the basement, I wonder why it gives such an error and how can it be corrected..
Did you tick the subbasement box on all your curtains? If there is a curtain that you have skipped, the program will consider it as a carrier curtain and include it in the R coefficient control. If you can't find the reason, upload your project and let's examine it.