R cannot be resolved error when using ActionBarSherlock

Question

I am trying to use Jake Wharton\'s ActionBarSherlock to support actionbars in android projects all the way down to 1.6

I\'m getting started using the video provided

Answer 1

Found it!

Instead of:

Project > Clean > Clean Projects Selected Below

you must use

Project > Clean > Clean All Projects

Even if none of the other projects have anything to do with the library project. This fixed the problem