I had some flights last month on Ethiopian Airlines where all but one segment have credited to my Mileage Plus account. The one segment that did not credit was from Blantyre, Malawi to Addis Ababa. This did not credit even though the onward connecting flight from Addis to Mumbai credited within 48 hours. To be fair, I did not really expect the miles to auto-post as there were many irregularities with this sector. a) The flight number was changed after initially booking (from ET 877 to ET 875) and the flight was routed via Lilongwe rather than non-stop. b) The ticket had to be re-issued due to a misconnection earlier in the itinerary, so the ticket numbers changed. c) There is no functional DCS at Blantyre airport and no boarding passes are issued - they just cross names off a list and you have to pick out your checked bags at the aircraft side so that they are loaded. That said, my issue now lies with the Star Alliance retro-claim function on United.com. While trying to submit the request, I get the following response. "Our records indicate that you may have submitted incorrect data. Please resubmit your request." I've tried to resubmit multiple times, but the same error crops up. Any suggestions as to what my next step should be to get the miles credited? PS. The fare class and everything else are eligible for mileage credit, so that is not the problem here.