Third party library without Proguard rules causing Proguard error
<p>I am receiving the following error when trying to release an obfuscated version using proguard: </p>

<blockquote>
  <ul>
  <li>What went wrong: Execution failed for task ':MyApp:transformClassesAndResourcesWithProguardForMyAppRelease'.
  java.io.IOException: Please correct the above warnings first.</li>
  </ul>
</blockquote>

<p>Updated all my libraries to the latest version and I'm using gradle 2.0.0.</p>