I have Visual Studio 2012 and Visual Studio 2013 installed on my development machine. My SQL projects were created with VS2013 and they compile fine from Visual Studio, but they fail with the following message when I use MSBuild from the command line:
Build Error: Incompatible versions of SQL Server Data Tools and database runtime components are installed on this computer.
Note: This same error was encountered by other developers in Visual Studio 2012. See This SO question. I have verified that my versions of SSDT are up to date. I am not dealing with the same problem.