I played around with the columns a lot to get my project without the b error. I want to get a report without error B. 2nd floor, 1st floor has no b errors. There is 1 basement on the ground floor and a few in the 2nd basement, I couldn't fix them... 4.6 MB size file. Since this place accepts a maximum file size of 4 mb, I could not upload it. You can download it from the link. 
				
			
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