Waitlisted weeks ago using a RUC on a flight tomorrow. When to check in online and got "You do not have an electronic ticket. Please check in with an agent." Had both a text rep and a phone rep tell me that I will be able to check in once my upgrade has cleared and the phone agent said the only way I can check in now would be to remove the certificate from my ticket. I have only used RUCs once before and was pending until about 5 minutes before boarding, obviously I was able to check in before then. The idea you can't check in with a pending certificate seems ridiculous. Flight is early morning, so dealing with it at the airport is not appealing. There are still 5 seats available as of now (phone agent first said there were none, so that did not instill confidence). A text agent a few days ago said I was upgraded but not reticketed yet, but today she said that is not the case. Do I keep hanging up and calling again? Any special words I can use to help them figure out how to fix this?