[LibGDx][Android] Conversion to Dalvik format failed with error 1

hello guys … i’m having this error now and it is really confusing me
i have tried to clean project , stop auto build clean … etc but still not working

the full error code :


2014-05-18 02:39:24 - SuperRace-android] Dx 1 error; aborting
[2014-05-18 02:39:24 - SuperRace-android] Conversion to Dalvik format failed with error 1
[2014-05-18 02:40:22 - SuperRace-android] Dx 
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lnet/dermetfan/utils/libgdx/box2d/Chain$DefShapeBuilder;
	at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:122)
	at com.android.dx.dex.file.DexFile.add(DexFile.java:161)
	at com.android.dx.command.dexer.Main.processClass(Main.java:685)
	at com.android.dx.command.dexer.Main.processFileBytes(Main.java:634)
	at com.android.dx.command.dexer.Main.access$600(Main.java:78)
	at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:572)
	at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
	at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
	at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
	at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
	at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
	at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
	at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
	at com.android.dx.command.dexer.Main.processOne(Main.java:596)
	at com.android.dx.command.dexer.Main.processAllFiles(Main.java:498)
	at com.android.dx.command.dexer.Main.runMonoDex(Main.java:264)
	at com.android.dx.command.dexer.Main.run(Main.java:230)
	at sun.reflect.GeneratedMethodAccessor62.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.android.ide.eclipse.adt.internal.build.DexWrapper.run(DexWrapper.java:187)
	at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:813)
	at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java:597)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:733)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:328)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:403)
	at org.eclipse.core.internal.resources.Project$1.run(Project.java:618)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2345)
	at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:597)
	at org.eclipse.core.internal.resources.Project.build(Project.java:124)
	at com.android.ide.eclipse.adt.internal.project.ProjectHelper.doFullIncrementalDebugBuild(ProjectHelper.java:1143)
	at com.android.ide.eclipse.adt.internal.launch.LaunchConfigDelegate.launch(LaunchConfigDelegate.java:155)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:858)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
	at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1018)
	at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1222)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
[2014-05-18 02:40:22 - SuperRace-android] Dx 1 error; aborting
[2014-05-18 02:40:22 - SuperRace-android] Conversion to Dalvik format failed with error 1


i have no idea how to solve this and i need to present this project in few hours … help me please !
how to know where are the duplicate libs and how to remove them ?

A shot in the dark says you have two of the same libraries in the same program and you are trying to load two instances of the same thing. Kind of hard to write up any sort of fix without source code, but check to make sure you aren’t doubling up on libraries… Is this the first time you are building it or did it work before and stop working?

hello , it used to work but for some reason it stoped !
i fixed it by creating a new project and recreate all classes and packges and then copy my old code

thank you