Originally Posted by
findark
My original point was that there is no inventory marrying rule for the >4h00 connections on SFO-DEN-YYC because that part of the computer thinks it's impossible to price on a single fare. The fact that assumption is wrong is the whole reason why the situation in the OP came up.
I agree with your observation that inventory validation seems to be driven by its own rules and is oblivious to what the fare rules are saying about connections. I don't know if this is deliberate or just an oversight of the "this is never supposed to happen"-kind, but I agree it's more likely that no one noticed or considered this. Nice find and a good thing for OP!