UIButton with IB_DESIGNABLE throws runtime attribute warning and does not render in Interface Builder

Question

I\'m running Xcode 6.1 and I have been using IB_DESIGNABLE with IBInspectable for quite a few projects already but all of the sudden it just doesn\'t work anymore. I have create

Answer 1

I had this error, when has two targets. One with my main project and other with target, where i hold designable classes (for faster build).
The issue was that in storyboard there were missing a Module.