firstly ,thank you for reply.i am using java 6 on windows.i checked installed software ,and found seam tools existing there. following is log. !ENTRY org.eclipse.equinox.p2.metadata.generator 2 0 2009-05-26 19:06:04.218 !MESSAGE An error occurred while loading the bundle manifest D:\eclipse\plugins\org.eclipse.jpt.core_2.0.102.v200901160200.jar !STACK 0 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 org.eclipse.equinox.internal.provisional.p2.metadata.generator.BundleDescriptionFactory.loadManifest(BundleDescriptionFactory.java:124) at org.eclipse.equinox.internal.provisional.p2.metadata.generator.BundleDescriptionFactory.getBundleDescription(BundleDescriptionFactory.java:96) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.RepositoryListener.processBundle(RepositoryListener.java:236) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.RepositoryListener.process(RepositoryListener.java:226) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.RepositoryListener.added(RepositoryListener.java:201) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryWatcher.processFile(DirectoryWatcher.java:200) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryWatcher.scanDirectories(DirectoryWatcher.java:161) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryWatcher.poll(DirectoryWatcher.java:108) at org.eclipse.equinox.internal.p2.extensionlocation.ExtensionLocationArtifactRepository.ensureInitialized(ExtensionLocationArtifactRepository.java:70) at org.eclipse.equinox.internal.p2.extensionlocation.ExtensionLocationArtifactRepository.getProperties(ExtensionLocationArtifactRepository.java:190) at org.eclipse.equinox.internal.p2.artifact.repository.ArtifactRepositoryManager.addRepository(ArtifactRepositoryManager.java:106) at org.eclipse.equinox.internal.p2.artifact.repository.ArtifactRepositoryManager.addRepository(ArtifactRepositoryManager.java:90) at org.eclipse.equinox.internal.p2.reconciler.dropins.Activator.createExtensionLocationArtifactRepository(Activator.java:102) at org.eclipse.equinox.internal.p2.reconciler.dropins.PlatformXmlListener.synchronizeConfiguration(PlatformXmlListener.java:236) at org.eclipse.equinox.internal.p2.reconciler.dropins.PlatformXmlListener.stopPoll(PlatformXmlListener.java:133) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryWatcher.stopPoll(DirectoryWatcher.java:172) at org.eclipse.equinox.internal.provisional.p2.directorywatcher.DirectoryWatcher.poll(DirectoryWatcher.java:109) at org.eclipse.equinox.internal.p2.reconciler.dropins.Activator.watchConfiguration(Activator.java:449) at org.eclipse.equinox.internal.p2.reconciler.dropins.Activator.start(Activator.java:159) at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:1009) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:1003) at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:984) at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:346) at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:355) at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1074) at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:616) at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:508) at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:299) at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:489) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:211) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:321)
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