App-V: Error Code 0000C800 (Update)
I have a previous post about this particular error here, but a recent App-V Blog entry reminded me to post the other (though not nearly AS common if your DBA's aren't asleep) solution.
Catch that over here.
This can occur if TCP/IP is disabled in SQL Server Configuration Manager under SQL Server Network Configuration on the App-V Database SQL Server.
On the SQL Server where the App-V Database resides, launch SQL Server Configuration Manager, navigate and expand the SQL Server Network Configuration node and enable the TCP/IP protocol on the SQL instance that hosts the App-V Database.
Also, sorry for the lack of updates lately, been working on some other non-App-V, non-XenServer (though still mostly Xen) stuff.