since updating ADT to r14, i've been plagued by the bug described here http://code.google.com/p/android/issues/detail?id=20398
and here http://stackoverflow.com/questions/7823312/problems-building-with-adt-r14 i was surprised that i couldn't find a thread about this bug in this group. i'm hoping someone here has some insight. i've tried all the solutions offered so far, and none of them work for me. my comment from the bug report: i'm having this problem too. my app only references one library - my LVL library. i have tried removing the reference, cleaning .classpath, and .project, and removing references to source folders. i've cleaned the project, opened and closed it, and waved a dead chicken over my keyboard. nothing has worked. please help! my console output with stack trace: [2011-10-20 23:32:04 - MyApp] Dx UNEXPECTED TOP-LEVEL EXCEPTION:java.lang.IllegalArgumentException: already added: Lcom/ android/vending/licensing/AESObfuscator; [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java: 123) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.dex.file.DexFile.add(DexFile.java:163) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main.processClass(Main.java:486) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main.processFileBytes(Main.java:455) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main.access$400(Main.java:67) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main $1.processFileBytes(Main.java:394) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java: 245) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java: 131) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java: 109) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main.processOne(Main.java:418) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main.processAllFiles(Main.java:329) [2011-10-20 23:32:04 - MyApp] Dx at com.android.dx.command.dexer.Main.run(Main.java:206) [2011-10-20 23:32:04 - MyApp] Dx at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [2011-10-20 23:32:04 - MyApp] Dx at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [2011-10-20 23:32:04 - MyApp] Dx at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [2011-10-20 23:32:04 - MyApp] Dx at java.lang.reflect.Method.invoke(Unknown Source) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.build.DexWrapper.run(DexWrapper.java: 179) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java: 729) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java: 602) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java: 629) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java: 172) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java: 282) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java: 363) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.resources.Project$1.run(Project.java:545) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.resources.Project.internalBuild(Project.java: 524) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.core.internal.resources.Project.build(Project.java:123) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.project.ProjectHelper.build(ProjectHelper.java: 869) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.project.ExportHelper.exportReleaseApk(ExportHelper.java: 84) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.wizards.export.ExportWizard.doExport(ExportWizard.java: 290) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.wizards.export.ExportWizard.access $0(ExportWizard.java:229) [2011-10-20 23:32:04 - MyApp] Dx at com.android.ide.eclipse.adt.internal.wizards.export.ExportWizard $1.run(ExportWizard.java:214) [2011-10-20 23:32:04 - MyApp] Dx at org.eclipse.jface.operation.ModalContext $ModalContextThread.run(ModalContext.java:121) [2011-10-20 23:32:04 - MyApp] Dx 1 error; aborting [2011-10-20 23:32:04 - MyApp] Conversion to Dalvik format failed with error 1 -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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