Missing ClamAV Pattern Database on 4.30 SP206
Even you have configured correctly updates, you still have this error
Since September you can see that Artica claim about missing databases.
This error is due to changes on ClamAV 0.104 version that changes some attributes.
To fix this issue, Artica Tech as build it's own ClamAV repository, for versions before 4.30x Service Pack 333, you need to apply this HotFix: