Originally Posted by anabolism

Yes, we have been discussing inventory restrictions; it's clear that there is a point of commencement/origination restriction; the AA RTW desk says there is a type of fare limitation but TAs in this thread can't find evidence of this. Most recently, I mentioned another flight that is available in 'D' except as part of an ex-OSL RTW, which attracted a comment to the effect that of course such flights are unavailable because it's a very busy time, to which I clarified that the flight has plenty of 'D' except as part of an ex-OSL RTW.