I'm trying to book a flight on AC in J from YYZ to BKK and am trying to avoid the HKK flight in favor of NRT. As we have an AC contract at work, I need to fly an AC codeshared flight. For the entire month of April and beyond the only codeshare flight for the AC1 connection is AC9851 which is a codeshare of NH915. However, despite plenty of C/J availability on the flight from NH, AC is unable to sell any J on that flight at any time.

Just wondering if this is a system error, or a limitation in NH codeshare agreement. The SE desk seems to think it's an error, but was not able to resolve. I'm wondering if anyone else has any insight. If it's not an error, it certianly takes the value out of the codeshare.