java.lang.RuntimeException: This exception has no message.

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java.util.zip.ZipException: error in opening zip file	at java.util.zip.ZipFile.open(Native Method)	at java.util.zip.ZipFile.(Unknown Source)	at java.util.zip.ZipFile.(Unknown Source)	at org.eclipse.osgi.framework.util.SecureAction.getZipFile(SecureAction.java:288)	at org.eclipse.osgi.storage.bundlefile.ZipBundleFile.basicOpen(ZipBundleFile.java:85)	at org.eclipse.osgi.storage.bundlefile.ZipBundleFile.getZipFile(ZipBundleFile.java:98)	at org.eclipse.osgi.storage.bundlefile.ZipBundleFile.open(ZipBundleFile.java:347)	at org.eclipse.osgi.storage.Storage.install(Storage.java:509)	at org.eclipse.osgi.internal.framework.BundleContextImpl.installBundle(BundleContextImpl.java:146)	at org.eclipse.osgi.internal.framework.BundleContextImpl.installBundle(BundleContextImpl.java:139)	at org.eclipse.gmf.codegen.util.ExtensionTemplatesProviderImpl.loadBundle(ExtensionTemplatesProviderImpl.java:79)	at org.eclipse.gmf.codegen.util.ExtensionTemplatesProviderImpl.(ExtensionTemplatesProviderImpl.java:51)	at org.eclipse.gmf.codegen.xtend.ui.handlers.CodegenEmittersWithXtend2.(CodegenEmittersWithXtend2.java:29)	at org.eclipse.papyrus.codegen.PapyrusCodegenEmitters.(PapyrusCodegenEmitters.java:23)	at org.eclipse.papyrus.codegen.PapyrusExecuteTemplatesOperation.createGenerator(PapyrusExecuteTemplatesOperation.java:33)	at org.eclipse.papyrus.codegen.PapyrusExecuteTemplatesOperation.createGenerator(PapyrusExecuteTemplatesOperation.java:1)	at org.eclipse.gmf.internal.codegen.popup.actions.ExecuteTemplatesOperation.run(ExecuteTemplatesOperation.java:225)	at org.eclipse.gmf.internal.codegen.popup.actions.ExecuteTemplatesOperation$1.run(ExecuteTemplatesOperation.java:122)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)