Finally, it has arrived. Well 2006 has arrived almost....whooohooo. It's just not as sexy as Y2K though, is it?
The list in the below link shows all the predefined Integration Services errors, warnings, and informational messages, in numerical order within each category, along with their numeric codes and symbolic names. You can use this to properly trap for errors and provide better user errors.
http://msdn2.microsoft.com/en-us/library/ms345164.aspx
-- Brian Knight