I have a trip coming up with a total of 6 segments (all on UA or UX metal and all with stopovers less than the 4 hour maximum) and when I went to do OLCI today, it said my itinerary was "not eligible" for on-line check-in on ual.com. After some Google and Flyertalk searching, I read something Fastair said about all IATA airlines considering one-way tickets with over 4 segments "conjunctive" tickets (having two separate ticket numbers for a single trip). Are these types of tickets not eligible for OLCI? You would think it would let you at least check-in for the first 4 segments.