I have an interesting saga with an attempt to reissue a RTW, issued by AA in Cairo. Almost all of my remaining flights are on CX, so I decided it made sense to have CX reissue the ticket.

LAX
- Arrived 3 hours before flight
- Asked them to send relevant info to Cathay in HKG so that on arrival the ticket would be ready to reissue
- Told that only AA could do reticketing
- Then said they would call the one and only OneWorld ticket expert at LAX and reissue there
- Took my ticket and told me they would bring it to me on the plane
- received many contradictory messages as to my ticket, most of which were that my ticket would be sent on the 2am flight to HKG (I was on the midnight flight)
- in the end, a CX agent brought it to me just before doors closed with nothing done

HKG
- met on arrival; told they knew they were to reissue my ticket and to go to the Wing as the ticketing office was not yet open
- spoke to person in Wing. She took relevant coupon books as well as all my pricing info from Cairo.
- She returned, and asked me for the portion of ticket on which I am traveling today.
- She returned with the ticket and said I lacked the receipts for the booklets on which I had finished travel. Without them, the ticket could not be reissued.

So I guess that in the end it was my fault that the ticket didn't get reissued - but I marvel at the number of hours it took them to see that I had 3 of the booklet receipts rather than five.