Originally Posted by Dave Noble

Are you searching for MSY-NCE or seatching as 2 (or more) segments MSY-xxx/xxx-NCE ?

If the latter, it could just be a married sector availability issue - A-B may be available in a particular booking class and B-C may be available in the same booking class , but not as A-C via B

The individual searches wll be ok, but when it goes to price it, it will check for through availability and then say that the flights are no longer available