I just got some kind of error when trying to using Action Bar Compat support library to my project, I don't know what's wrong, because I have followed the instructions from this link > http://developer.android.com/tools/support-library/setup.html
So, this is the screen shot of the error ..
I also encountered such problem. My error was: The container 'Android Dependencies' references non existing library 'C:\development\adt-bundle-windows-x86-20140702\workspace\appcompat_v7\bin\appcompat_v7.jar'
To solve this, I went project>properties>java build path>libraries>add jars>appcompat_v7>libs>, then I selected android-support-v7-appcompat.jar. After this, I went to project>clean. This fixed the problem. Hope you find my hint helpful.