控制檯錯誤。無法執行dex？

請誰能告訴我如何解決下面發佈的錯誤？儘管應用程序沒有錯誤，但當我嘗試啓動它時收到該錯誤。控制檯錯誤。無法執行dex？

Console_Error

[2014-11-06 13:04:49 - org.eclipse.paho.android.service.test] Dx 
trouble writing output: already prepared 
[2014-11-06 13:04:49 - Dex Loader] Unable to execute dex: Multiple dex files define 
Lorg/eclipse/paho/android/service/AlarmPingSender$AlarmReceiver$1; 
[2014-11-06 13:04:49 - org.eclipse.paho.android.service.test] Conversion to Dalvik format failed: 
Unable to execute dex: Multiple dex files define 
Lorg/eclipse/paho/android/service/AlarmPingSender$AlarmReceiver$1;

來源

2014-11-06 user2121

Right click on the Project Name 
Select Build Path -> Configure Build Path 
In Java Build Path, go to the tab Order and Export 

Uncheck your .jar library

只是有時：爲了和導出選項卡我沒有任何的jar庫那裏，所以我選中 Android的私人圖書館項目。現在我的項目正在運行。

check this

來源

2014-11-06 12:18:19