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- java.lang.IllegalStateException: [Winsys] TopComponent org.netbeans.modules.java.JavaEditor$JavaEditorComponent[tcammenu.java,0,0,0x0,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=256,maximumSize=,minimumSize=,preferredSize=] throws runtime exception from its componentShowing() method. Repair it! [catch] at org.openide.windows.WindowManager.componentShowing(WindowManager.java:289)