i was fully entitled to an upgrade from HKG to YYZ. there were a number of open seats. i am a Super Elite. i asked at AP in HKG why with the class of Y fare paid i did not get an upgrade, and was told the computer does it. i asked what the criteria was for establishing the upgrade sequense and was told they have no idea. i must write in. how can a person plan or understand the system when it is arbitrary and secrective. the criteria needs to be on the web. i was told that sometime Elite get upgraded ahead of SE if their fare structure was higher. i have always understadn that SE have 1st preference on upgrades. can AC please get this underlying issue cleared up. we deserve better. i have done 800K with AC over the years. no way to treat a customers.