Originally Posted by
Leo123
-I was playing with the RTW tool and figuring out would it be better to go around the globe opposite way that i have first thought so I made this routing:
MPM-DOH-HEL-NRT-KUL-DPS-HKG-LAX-MIA-.. and then i thought i had to go back to the Africa for my starting point, but it gives me options to flight LHR for stopover, then BCN for stopover and even back to Helsinki before going back to Africa. I thought i can`t come back to Europe if i have leave there once (i had stopover in DOH and HEL beginning of the trip). What is the rule that I don`t understand? (okey there might be many rules..

You can enter Europe/Middle East 1 extra time if it is a transit without stopover between Africa and the previous/next continent. You can certainly do a ...MIA-DOH-MPM/JNB/NBO etc. Since you have already stopped in Europe, you can only transit DOH.
What may be a problem is that you have flown between the ME part of Europe/ME continent and the Europe part of Europe/ME continent. You may not be able to do a MIA-LHR/MAD-Africa. There were many updates to the rules during the last 6 months and depending upon when you bought the ticket, clause 3.2.3 (travel may not include any flown or surface sector between Europe & Middle East) may apply. Being an ex-MPM ticket, that clause was in effect at the time. So if you want to go in the opposite direction to Asia, you are limited to the DOH transit. I will let the expert, pandaperth, let us know if I am wrong.
I suspect that the RTW tool does not know that you have an older ticket with the above restriction. That rule was dropped recently.