I doubt there will be a problem. If it's an AA staffed location then it will definitely be OK, if it's BA staffed then so long as it's reasonably close then you should also be OK. SABRE and Amadeus do sometimes have interface issues. I would check in 10 minutes earlier than normal and leave it at that. From OSL (presumably) then 24 hours before departure do Online Checkin and ring up if there is a problem. We occasionally see worried FTers with name problems in this forum. They hardly ever come back to tell us what happened on the day, which I am taking to mean it all went fine.