Swift 3 / Xcode 8 Upgrade - 100's of DerivedData files missing from working copy errors

Question

I have just upgraded to the latest Beta version of XCode and Swift but after using the converter my app project now has over 200 build time yellow errors all stating /\"projectD

Answer 1

Follow these steps.

1. Open svn or source tree.
2. These files will be coming there.
3. Remove these files from the source tree or svn.
4. Now come to the xcode project.
5. Now commit the code once. All the warning