"This reservation is not eligible to be upgraded"
My parents just booked a LAX-SFO-ZRH and CDG-LAX via their cruise line. It's one PNR with the LAX-SFO leg booking into B, and the SFO-ZRH leg booking into R. The return is on AF booking into A. When I click the "Upgrade Cabin" link, I get the error message that "This reservation is not eligible to be upgraded". Is it because of the AF leg? When I click on "Fare Rules", I just get an endless spinner.