title: In Eclipse - Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Landroid/support/annotation/AnimRes;
body: <p>I can see the same question has been asked many times, but from all the answers available I couldn't find any solution for my problem.</p>
  
  <p>My project is using 2 library projects &amp; I also have included following jar files in libs.</p>
  
  <p><em>- android-support-v4.jar</em></p>
  
  <p><em>- aws-android-sdk-core-2.1.10.jar</em></p>
  
  <p><em>- aws-android-sdk-s3-2.1.10.jar</em> </p>
  
  <p><em>- crashlytics.jar</em> </p>
  
  <p><em>- gson-2.3.1.jar</em> </p>
  
  <p><em>- library-1.0.15.jar (For Volley)</em> </p>
  
  <p><em>- picasso-2.2.0.jar</em></p>
  
  <p>While development, my app was running fine. But the moment I tried to Export, for creating signed APK file I got an error message.</p>
  
  <p><em>"Conversion to Dalvik format failed with error 1"</em></p>
  
  <p>In console, I checked the messages, </p>
  
  <p><em>"Jar mismatch! Fix your dependencies
  Found 3 versions of android-support-v4.jar in the dependency list, but not all the versions are identical."</em></p>
  
  <p>In the message itself I checked that one of the android-support-v4.jar (from one of the library projects) files is different, so I replaced it with the other jar file. Now all the jar files are identical. </p>
  
  <p>But now when I try to run the project I am getting one another error message</p>
  
  <p><em>"Your project contains error(s), please fix them before running your application."</em></p>
  
  <p>Now on checking console I see following messages.</p>
  
  <p><em>[2015-07-15 11:23:13 - Dex Loader] Unable to execute dex: Multiple dex files define Landroid/support/annotation/AnimRes;</em></p>
  
  <p><em>[2015-07-15 11:23:13 - MyApp] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Landroid/support/annotation/AnimRes;</em></p>
  
  <p>From some answers, I found that this issue is because of to multiple occurrences of the same jar file getting added in the project.
  All the included jar files are 3rd party &amp; necessary for the project.</p>
  
  <p>I have tried some of the ways suggested in other answer, but I am not able to solve this issue.  </p>
  
  <p>Please help me to solve it.</p>