XCode 4 hangs at "Loading Project"

Question

I don't have much to go on... XCode 4 is hanging at startup with "Loading Project". My build fails but I can't access the errors. This is happening with a project that worked in a previous version of XCode. It also happens for new projects.

Answer 1

I had a simliar issue. I deleted project.xcworkspace and xcuserdata inside the .xcodeproj directory and I was able to open the project file.