Finding naked edges

Anyone can help me search where is the naked edges on this model cause i do checked the naked edges on show edges but the comment show no naked edges found. But once i uploads to my CFD apps and it stated the model is not watertight. please help me please

Modified1 copy.3dm (4.1 MB)

PLEASE make your post title short and ask your question in the body of the message. That’s what it’s there for…

Is it these surfaces? Sorry, I don’t have the software you are importing into to test this.