Conversion issues moving from VS 2005 to VS 2008

I was asked to look at a case yesterday where the customer was hitting the following error after converting a VS 2005 Project to VS 2008. Error 3 Custom tool error: Failed to generate code. Failed to generate code. Exception of type ‘System.Data.Design.InternalException’ was thrown. Exception of type ‘System.Data.Design.InternalException’ was thrown. This was being produce…

3