title: ':app:dexDebug'. com.android.ide.common.process.ProcessException
body: <p>If I add paypal sdk then I get this problem else my project is running successfully.</p>
  
  <p>Can some tell me from which dependency it is conflicting?</p>
  
  <p>Here are my dependencies...</p>
  
  <pre><code>    compile 'com.android.support:support-v13:23.1.0'
      compile 'com.google.android.gms:play-services-plus:8.1.0'
      compile 'com.google.android.gms:play-services-gcm:8.1.0'
      compile 'com.google.android.gms:play-services-analytics:8.1.0'
      compile 'com.android.support:design:23.1.0'
      compile 'com.android.support:cardview-v7:23.1.0'
      compile 'com.facebook.android:facebook-android-sdk:4.1.0'
      compile 'com.squareup.picasso:picasso:2.5.2'
      compile 'com.mcxiaoke.volley:library:1.0.19'
      compile 'com.android.support:appcompat-v7:23.1.0'
      compile 'com.android.support:recyclerview-v7:23.1.0'
      compile 'com.android.support:multidex:1.0.1'
  
      compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'
      compile 'com.squareup.retrofit:adapter-rxjava:2.0.0-beta2'
      compile 'io.reactivex:rxandroid:1.0.1'
      compile 'com.jakewharton:butterknife:7.0.1'
  
      compile files('libs/PayPalAndroidSDK-2.11.1.jar'
  </code></pre>
  
  <p>I removed build files and rebuilt the project but no hope and strange part is I have one dummy project where I write code first, in that project everything working fine but here getting error always.</p>