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Transaction is already running
java.lang.IllegalStateException: Transaction is already running	at net.sourceforge.ganttproject.AbstractChartImplementation$ChartSelectionImpl.startCopyClipboardTransaction(AbstractChartImplementation.java:505)	at net.sourceforge.ganttproject.chart.gantt.GanttChartSelection.startCopyClipboardTransaction(GanttChartSelection.java:77)	at net.sourceforge.ganttproject.action.edit.CopyAction.actionPerformed(CopyAction.java:37)	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)	at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)	at javax.swing.JTable.processKeyBinding(JTable.java:5259)	at net.sourceforge.ganttproject.GPTreeTableBase.processKeyBinding(GPTreeTableBase.java:427)	at javax.swing.JComponent.processKeyBindings(JComponent.java:2929)	at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)	at java.awt.Component.processEvent(Component.java:6310)	at java.awt.Container.processEvent(Container.java:2236)	at java.awt.Component.dispatchEventImpl(Component.java:4889)	at java.awt.Container.dispatchEventImpl(Container.java:2294)	at java.awt.Component.dispatchEvent(Component.java:4711)	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)	at java.awt.Component.dispatchEventImpl(Component.java:4760)	at java.awt.Container.dispatchEventImpl(Container.java:2294)	at java.awt.Window.dispatchEventImpl(Window.java:2746)	at java.awt.Component.dispatchEvent(Component.java:4711)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:731)	at java.awt.EventQueue$4.run(EventQueue.java:729)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)