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here it is : java.lang.IndexOutOfBoundsException: Invalid line index=687 >= lineCount=683 at org.netbeans.editor.LineRootElement.getElement(LineRootElement.java:54) at org.openide.text.NbDocument.findLineOffset(NbDocument.java:124) at org.netbeans.modules.merge.builtin.visualizer.MergePanel.writeResult(MergePanel.java:1469) at org.netbeans.modules.merge.builtin.visualizer.MergeControl.vetoableChange(MergeControl.java:320) at org.openide.util.WeakListener$VetoableChange.vetoableChange(WeakListener.java:515) at java.beans.VetoableChangeSupport.fireVetoableChange(VetoableChangeSupport.java:300) at java.beans.VetoableChangeSupport.fireVetoableChange(VetoableChangeSupport.java:217) at javax.swing.JComponent.fireVetoableChange(JComponent.java:4088) at org.netbeans.modules.merge.builtin.visualizer.MergeDialogComponent.access$801(MergeDialogComponent.java:60) at org.netbeans.modules.merge.builtin.visualizer.MergeDialogComponent$MergeNode.save(MergeDialogComponent.java:453) at org.netbeans.modules.merge.builtin.visualizer.MergeDialogComponent.okButtonActionPerformed(MergeDialogComponent.java:216) at org.netbeans.modules.merge.builtin.visualizer.MergeDialogComponent.access$000(MergeDialogComponent.java:60) at org.netbeans.modules.merge.builtin.visualizer.MergeDialogComponent$1.actionPerformed(MergeDialogComponent.java:124) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1797) at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1850) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245) at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:227) at java.awt.Component.processMouseEvent(Component.java:5093) at java.awt.Component.processEvent(Component.java:4890) at java.awt.Container.processEvent(Container.java:1566) at java.awt.Component.dispatchEventImpl(Component.java:3598) at java.awt.Container.dispatchEventImpl(Container.java:1623) at java.awt.Component.dispatchEvent(Component.java:3439) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095) at java.awt.Container.dispatchEventImpl(Container.java:1609) at java.awt.Window.dispatchEventImpl(Window.java:1585) at java.awt.Component.dispatchEvent(Component.java:3439) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:450) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:230) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:183) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
*** This issue has been marked as a duplicate of 33040 ***