Salodh,
3 months after the fact... we LOST AVC reporting which means we had it, which means we had already purchased the licenses. Not sure if you really thought this was a helpful answer.
The problem turned out to be that during PI upgrade, the destination netflow collector IP address was changed to a nonsensical value- not by us but by the process itself. We've seen all kinds of settings change during controller or NMS upgrades, and it's just one more thing to not love about Cisco wireless.
