we've moved a multi-project solution from VSS to TFS 2012. We've removed all of the scc files from the solution, but when opening the solution we still receive error messages about the project missing source control files. When opening the solution from the TFS Source Control Explorer, VS2010 gives the error message, but opens the solution under source control. When opening the solution directly from the local .sln file, it gives the error messages and opens the solution without source control.
Any ideas? Are there updates we need to make to the csproj and sln files to remove references to VSS?