I like these ex-MPM tickets so much that this week I have bought two of them
One will start in September and the other in June next year.
The first one I bought through a travel agent in Australia (see post #48 in this thread -
http://www.flyertalk.com/forum/onewo...periences.html)
The second I bought direct from AA by phoning its ATW desk in Dallas - see post #59)
You say you're getting an error message - are you using the online tool to try and book? Don't! The tool cannot sell you a ticket with Qatar Airways as the first carrier, and also it cannot handle the new backtracking rules which came into effect in May.
Your itinerary will have to start with MPM-DOH because that is the only Oneworld flight out of Mozambique. At the end you must return to Africa - but you are not required to return to Mozambique. I think most people are finishing in JNB, though on my second ticket I am ending in DKR
Feel free to post your proposed itinerary in this forum and I'm sure you will get many helpful comments