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Build: NetBeans IDE Dev (Build 200905120201) VM: Java HotSpot(TM) Client VM, 16.0-b02, Java(TM) SE Runtime Environment, 1.7.0-ea-b57 OS: Windows XP, 5.1, x86 User Comments: martinhavle: Occured when creating bean based on java.awt.Panel. Stacktrace: java.lang.IllegalStateException: [Winsys] TopComponent org.netbeans.core.multiview.MultiViewCloneableTopComponent throws runtime exception from its componentShowing() method. Please repair it! Probable cause is at org.netbeans.modules.form.fakepeer.$Proxy23.updateGraphicsData(Unknown Source) at org.openide.windows.WindowManager.logThrowable(WindowManager.java:361) at org.openide.windows.WindowManager.componentShowing(WindowManager.java:332) at org.netbeans.core.windows.WindowManagerImpl.componentShowing(WindowManagerImpl.java:1057) at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:161) at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:269) at org.netbeans.core.windows.ViewRequestor.processRequest(ViewRequestor.java:245)
Created attachment 81949 [details] stacktrace
Build: NetBeans IDE Dev (Build 200905120201) VM: Java HotSpot(TM) Client VM, 16.0-b02, Java(TM) SE Runtime Environment, 1.7.0-ea-b57 OS: Windows XP, 5.1, x86 User Comments: Stacktrace: java.lang.IllegalStateException: [Winsys] TopComponent org.netbeans.core.multiview.MultiViewCloneableTopComponent throws runtime exception from its componentShowing() method. Please repair it! Probable cause is at org.netbeans.modules.form.fakepeer.$Proxy23.updateGraphicsData(Unknown Source) at org.openide.windows.WindowManager.logThrowable(WindowManager.java:361) at org.openide.windows.WindowManager.componentShowing(WindowManager.java:332) at org.netbeans.core.windows.WindowManagerImpl.componentShowing(WindowManagerImpl.java:1057) at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:161) at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:269) at org.netbeans.core.windows.ViewRequestor.processRequest(ViewRequestor.java:245)
Created attachment 81952 [details] stacktrace
Martin, could you please try the same scenario with JDK 6 ?
Does not happen on JDK6, it is just an issue of JDK7.
*** This issue has been marked as a duplicate of 164925 ***
v/c