This error started generating since last 2 days on a scheduled job that uses SSIS to import content from a flat file. Eventually we found that a derived column within the table and the flat file flow where dates in YYYYMMDD are changed to MM/DD/YYYY format. Then the string MM/DD/YYYY is converted to a date in a Data Conversion flow. And finally ...

Source: Knowledge Base Product: Microsoft SQL Server 2005 Standard Edition, SQL Server 2005 Enterprise X64 Edition & SQL Server 2005 Enterprise Edition Notification Contents: New and All Modifications FIX: Error message when you run a query that is associated with a parallel execution plan in SQL Server 2005: ''SQL Server Assertion: File: ...