I searched and searched for what I know is a thread specifically on this topic, but could not find it. So please feel free to merge. Here is my question:

I'm looking for upgrade inventory using my platinum regional upgrade certificate. I've searched using ExpertFlyer and I'm finding plenty of R/O inventory. However, I'm being told those flights do NOT have upgrade inventory.

Per the thread I can't find, it was my understanding that R/O inventory on ExpertFlyer was upgradable using these certs. Has this changed?

Thanks for everyone's help.