I am starting my 4th RTW ex-CAI in June (4th "head-to-tail"), and AA RTW desk told me that because my ticket included flights to CMB, it would have to be paper even if < 16 segments as CMB (and a few other cities in OW network) are not set up for electronic ticketing. I had considered just having DONE4 issued with < 16 segs and removing CMB flights, but Emeco will FedEx me the ticket, or have it delivered to my hotel in CAI.

As an addendum, when ending one RTW & starting another (in CAI), I like to overnight for 2 nights just in case there is a flight delay and I arrive in CAI a day later than expected.