I just started getting this message when tryiong to use the AS Messaging Center view. It was all working great (v 1.6) and this error started occurring. I have tried updating to 1.7.3. but the error persists. All other aspects of the AS seem to be working.

Nothing has changed with messaging in quite awhile. Are you using an objectQualifier for your database?

Odd thing. The entire table was missing from the database. I restored just that table from a backup and it seems to be functioning now. I have no explanation on how the table was dropped.

I think you had something similar happen before with an Active Forums upgrade, didn't you? Sounds like something with the DNN installer isn't keeping track of versions properly.

Before, my old site had been upgraded from DNN3->4->5 and it was a mess. I relaunchged my site with a fresh DNN5 install and everything has been working so much better except for this little hiccup. Luckily it was an easy fix.