Traveling tonight from SFO on a Mixed UA/AC itin (all with united flt #s). OLCI use to work for this, but on the new site i'm getting an error:

"We are unable to complete the check-in process as a valid ticket coupon cannot be found. Please contact a United representative at 1-800-300-1547 for assistance."

Worth calling, or just a codeshare issue to figure out at the airport?