java.util.ConcurrentModificationException
        at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
        at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)
        at org.netbeans.modules.timers.TimeComponentPanel.fillTimeTable(TimeComponentPanel.java:181)
        at org.netbeans.modules.timers.TimeComponentPanel.jList1ValueChanged(TimeComponentPanel.java:152)
        at org.netbeans.modules.timers.TimeComponentPanel.access$000(TimeComponentPanel.java:72)
        at org.netbeans.modules.timers.TimeComponentPanel$1.valueChanged(TimeComponentPanel.java:109)
        at javax.swing.JList.fireSelectionValueChanged(JList.java:1765)
        at javax.swing.JList$ListSelectionHandler.valueChanged(JList.java:1779)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398)
        at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:442)
        at javax.swing.JList.setSelectedIndex(JList.java:2179)
        at org.netbeans.modules.timers.TimeComponentPanel$3.run(TimeComponentPanel.java:259)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)