I was coming here to post the exact same thing, my flight on CX on MMB says the same message about it not being ticketed (this was booked as award travel through BA). I have 2 others reservations with BA award tickets on CX that are fine. I do hope that there is not a problem as it says to call Asia Miles and when I do all I get is a busy signal. CX might be a 5 star airline in the air, but their customer support rates as 1 star.