I should be able to multi-city search an award w/ stopover, right? CO keeps spitting this message at me:

! We could not process your request. Please see the message below and make revisions.

! Itinerary not valid for Reward Travel; see rules regarding Open-jaw Travel.


LAX-EWR-CDG-VIE
A regular itin gives me a forced overnight in CDG on the return, so I thought why not extend it by a couple nights.

I'm a NW Plat, not a CO OP member. And this is my very first ST redemption.

OT: would you route through IAH or EWR and why?