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

My fault was, that the ABS-project and my project had different API levels. ABS was on level 4.0.3 and my project had 3.0. After changing the API level of my project to 4.0.3 all errors were fixed. This post helped me to find the solution.