This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
There are a few things to check for an error like this:
1) Does that table/object/trigger/whatever it is actually exist?
2) Does the user querying the database have access to it?
3) If it is a stored procedure, does it need to be recompiled?