I flew overnight from YYZ - FRA and had some time on my hands before catching a train so I thought I'd go to the MLL there. The lounge person told me that I could not access the lounge as it was not an arrivals lounge and I didn't have an onward connection. I've never been denied access to other MLL's when using after my flight. Is this a special rule for FRA, is it because the flight is overnight so it is no longer "same day" or was the lounge person making up rules on the fly?