When I open my solution, I get a dialog with this warning. The solution (one web app, one class project) builds without errors.
How can I determine what properties are causing the problem, and resolve the error?
When I open my solution, I get a dialog with this warning. The solution (one web app, one class project) builds without errors.
How can I determine what properties are causing the problem, and resolve the error?
For me the problem was empty spaces (due to copy-paste) at the end of each line. By removing them I didn't get the error again.
I just fixed a similar issue in VS2012 with 44 projects.
The cause was a combination of a duplicated
GlobalSection(TeamFoundationVersionControl)
section (a la Boycs' answer), but I also had several projects duplicated--as well as a few references to projects which had been recently removed--within theGlobalSection(TeamFoundationVersionControl)
section that I kept.Once I had ensured that all of the referenced projects corresponded 1:1 with actual projects in my solution, the warning went away.
Aside: I suspect that the majority of these issues could have been avoided with closer attention paid to the .sln during branch and commit merges, but who knows what VS is thinking sometimes...