title: Android Studio fails to debug with error org.gradle.process.internal.ExecException
body: <p>I am trying to run the app in debug mode but I get the following error:</p>
  
  <pre><code>Error:Execution failed for task ':app:dexDebug'.
  &gt; com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_11\bin\java.exe'' finished with non-zero exit value 2
  </code></pre>
  
  <p>Below is my build.gradle file:</p>
  
  <pre><code>buildscript {
      repositories {
          maven { url 'https://maven.fabric.io/public' }
      }
  
      dependencies {
          classpath 'io.fabric.tools:gradle:1.+'
      }
  }
  apply plugin: 'com.android.application'
  apply plugin: 'io.fabric'
  apply plugin: 'idea'
  
  
  repositories {
      maven { url 'https://maven.fabric.io/public' }
  }
  
  
  android {
      compileSdkVersion 21
      buildToolsVersion '21.1.1'
      defaultConfig {
          applicationId 'com.rayat.pricewiz'
          minSdkVersion 17
          targetSdkVersion 21
          versionCode 1
          versionName '1.0'
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
              multiDexEnabled true
          }
      }
      productFlavors {
      }
  }
  
  android {
      packagingOptions {
          exclude 'META-INF/notice.txt'
          exclude 'META-INF/LICENSE.txt'
          exclude 'META-INF/license.txt'
          exclude 'META-INF/NOTICE.txt'
      }
      dexOptions {
          jumboMode = true
          javaMaxHeapSize "4g"
      }
  }
  
  dependencies {
      compile 'com.android.support:multidex:1.0.0'
      compile files('libs/ksoap2-android-assembly-2.5.8-jar-with-dependencies.jar')
      compile files('libs/universal-image-loader-1.9.2.jar')
      // You must install or update the Google Repository through the SDK manager to use this dependency.
      // You must install or update the Google Repository through the SDK manager to use this dependency.
      compile 'com.google.android.gms:play-services:6.1.71'
      compile 'com.android.support:recyclerview-v7:+'
      compile files('libs/CWAC-SackOfViewsAdapter.jar')
      compile 'com.octo.android.robospice:robospice:1.4.14'
      compile 'com.octo.android.robospice:robospice-spring-android:1.4.14'
      compile 'com.facebook.android:facebook-android-sdk:3.21.1'
      compile('com.twitter.sdk.android:twitter:1.1.1@aar') {
          transitive = true;
      }
      compile files('libs/javax.mail.jar')
      compile files('libs/jackson-databind-2.5.0.jar')
      compile files('libs/jackson-all-1.9.11.jar')
      compile files('libs/jackson-mini-1.9.11.jar')
      compile files('libs/scanditsdk-barcodepicker-android-4.2.1.jar')
      compile files('libs/nineoldandroids-2.4.0.jar')
      compile 'com.squareup.retrofit:retrofit:1.9.0'
      compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0'
      compile 'com.squareup.okhttp:okhttp:2.0.0'
  }
  </code></pre>
  
  <p>Can anyone please help as this error is driving me crazy. My code is hitting 65k limit so I added multiDexEnabled option.</p>
  
  <p><strong>EDIT</strong>
  My project architecture
  <img src="https://i.stack.imgur.com/z9WZs.jpg" alt="enter image description here">
  <img src="https://i.stack.imgur.com/5QyEa.jpg" alt="enter image description here">
  <img src="https://i.stack.imgur.com/gwQ6B.jpg" alt="enter image description here"></p>
  
  <p>Thanks</p>