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				What does this mean?
			 
			 
			
		
		
		
		
			
			I was trying to convert a book from .doc to AZW3. After fiddling with the metadata, I clicked the Convert Books Individually and this message popped up: 
 
calibre, version 3.36.0 
WARNING: Could not convert some books: Could not convert the book because no supported source format was found 
 
I don't understand why .doc isn't supported. I'll try saving the .doc as rtf to see if that helps.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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