I am currently using TFS with Visual Studio 2010 Ultimate and getting this error when I try to open up my solution:
The associated source control plug-in is no
I opened a solution in VS2010 (not my project), and got the same message. It gave me the options to either temporarily work with the solution uncontrolled, or to permanently remove source control association bindings. I went with the option to permanently remove source control association bindings.
Now open your project/solution. Goto File -> Source Control -> Change source control Select your projects and click bind.
Now bindings are correctly working online. This is how i was able to fix this issue. Hope it helps.