I recently installed Visual Studio 2010 and SQL Server 2012 on a Windows Server 2008 R2 machine - (including all updates/Service Packs).
When attempting to work on a
I tried reinstalling the SSDT as well, but kept getting the same error you mentioned Jed, this seemed to let me get around the error message:
http://forums.asp.net/t/1721552.aspx/1?Working+with+Denali+SQLEXPRESS+in+VS+11+Database+issue