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Build: NetBeans IDE 6.0 (Build 200711261600) VM: Java HotSpot(TM) Client VM, 1.5.0_07-b03 OS: Windows XP, 5.1, x86 User Comments: This exception always occurs in Netbeans 6 startup. Please reassign if necessary Filing on behalf of user reolca (automated exceptions reporter error - from desc 9 issue 126178) java.lang.ClassNotFoundException: org.netbeans.modules.print.impl.action.PreviewAction at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:231) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.openide.loaders.InstanceSupport.findClass(InstanceSupport.java:498) at org.openide.loaders.InstanceSupport.instanceClass(InstanceSupport.java:145) at org.openide.loaders.InstanceDataObject$Ser.instanceClass(InstanceDataObject.java:1159) at org.openide.loaders.InstanceSupport.instanceOf(InstanceSupport.java:181) at org.openide.loaders.InstanceDataObject$Ser.instanceOf(InstanceDataObject.java:1182) at org.openide.loaders.InstanceDataObject.instanceOf(InstanceDataObject.java:705) at org.openide.awt.Toolbar$Folder.acceptCookie(Toolbar.java:999) at org.openide.loaders.FolderInstance.acceptDataObject(FolderInstance.java:396) at org.openide.awt.Toolbar$Folder.acceptDataObject(Toolbar.java:966) at org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:681) at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:99) at org.openide.loaders.FolderInstance$2.run(FolderInstance.java:655) at org.openide.util.Task.run(Task.java:244) at org.openide.awt.AWTTask.run(AWTTask.java:57) at org.openide.awt.AWTTask.waitFinished(AWTTask.java:64) at org.openide.loaders.FolderInstance.waitFinished(FolderInstance.java:323) at org.openide.loaders.FolderInstance.instanceCreate(FolderInstance.java:265) at org.openide.loaders.FolderInstance.instanceForCookie(FolderInstance.java:548) at org.openide.loaders.FolderInstance$HoldInstance.instanceCreate(FolderInstance.java:1029) at org.openide.awt.ToolbarPool$Folder.createInstance(ToolbarPool.java:519) at org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:767) at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:99) at org.openide.loaders.FolderInstance$2.run(FolderInstance.java:655) at org.openide.util.Task.run(Task.java:244) at org.openide.awt.AWTTask.run(AWTTask.java:57) at org.openide.awt.AWTTask.waitFinished(AWTTask.java:64) at org.openide.loaders.FolderInstance.waitFinished(FolderInstance.java:323) at org.openide.loaders.FolderInstance.instanceFinished(FolderInstance.java:296) at org.openide.awt.ToolbarPool.waitFinished(ToolbarPool.java:235) at org.netbeans.core.windows.view.ui.MainWindow.getToolbarComponent(MainWindow.java:435) at org.netbeans.core.windows.view.ui.MainWindow.initializeComponents(MainWindow.java:154) at org.netbeans.core.windows.view.DefaultView.showWindowSystem(DefaultView.java:519) at org.netbeans.core.windows.view.DefaultView.windowSystemVisibilityChanged(DefaultView.java:498) at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:180) at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:269) at org.netbeans.core.windows.ViewRequestor.processVisibilityRequest(ViewRequestor.java:258) at org.netbeans.core.windows.ViewRequestor.postVisibilityRequest(ViewRequestor.java:195) at org.netbeans.core.windows.ViewRequestor.scheduleRequest(ViewRequestor.java:117) at org.netbeans.core.windows.Central.setVisible(Central.java:118) at org.netbeans.core.windows.WindowManagerImpl.setVisible(WindowManagerImpl.java:758) at org.netbeans.core.windows.WindowSystemImpl.show(WindowSystemImpl.java:87) at org.netbeans.core.NonGui$3.run(NonGui.java:210) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:461) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
please provide more details: how to reproduce it, attach project.