title: Unable to execute dex: Multiple dex files define Lcom/google/android/gcm/GCMBaseIntentService;
body: <p>I'm busy for a school assignment to create a timetable app which fetches data from my database by JSON. </p>
  
  <p>I use the GCM service for push notifications and Johan Nilsson's Android Actionbar.</p>
  
  <p>However, when I try to export my application to an .APK file the following errors occur. </p>
  
  <pre><code>[2012-12-10 10:28:03 - Dex Loader] Unable to execute dex: Multiple dex files define Lcom/google/android/gcm/GCMBaseIntentService;
  [2012-12-10 10:28:03 - TimeTable] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lcom/google/android/gcm/GCMBaseIntentService;
  </code></pre>
  
  <p>While exporting an Android Dependencies map is created and creating a duplicate. Inside there is a reference to GCM and the android actionbar. While the GCM is already in the referenced libraries map after adding the gcm to the build path from the libs folder.</p>
  
  <p>So after deleting the dependencies I can't run and export the application, because of the errors.</p>
  
  <p>I already tried cleaning and rebuilding the app. Please help me.</p>