Originally Posted by FrequentFlyer9000

Here is a simple example: You can't go NYC - Moscow - Athens on SkyTeam with a stopover in Moscow, at least not on one single award booking. This is because Moscow is not a valid stopover between NYC and Athens as it is not part of a published fare. .

Originally Posted by mtkeller

Note that this cuts out your proposed backtracking through AMS, which I think was what was causing the system to have fits. Using the TPDs, that should be a valid routing, allowing a stopover in OSL.