Updated route validation as per new rules in effect beginning Oct 10:
BIG ISSUE - Asiamiles Oneworld ticket rules change??? Immediate effect???
The tool will now check to ensure the itinerary adheres to a one stopover / openjaw limit per city. Note that the origin city and destination city (last city of the final leg) can no longer be used for stopovers or enroute openjaw cities.
I'm currently counting both the arriving and departing cities in an openjaw into the limit, i.e. if you have a NRT//KIX open jaw, the tool will flag any further stopovers/openjaws containing either Tokyo or Osaka airports as a violation. If anyone uncovers any evidence to the contrary, please let me know and I will update the rules.