Please I am experience the above message when I ranning the process manager in SL 2011 FP1. the window pops up with Fatal error 829.
I am sure there is an actual SQL Server expert in this forum who could answer your question much better, but this may be a place to start: www.wiki-errors.com/err.php
Thanks for you input. I looked up old cases and found a couple.
SQL Server message 21, Fatal error 90001 occured.
In that case, someone suggested running DBCC checks on the databases.
As Walt said, this sounds more like a SQL issue in possibly needing to fix corruption.