java.lang.IllegalArgumentException: Last path component must be non-null
                at javax.swing.tree.TreePath.<init>(Unknown Source)
                at javax.swing.event.TreeModelEvent.<init>(Unknown Source)
                at ru.bitel.common.client.treetable.DefaultBGTreeTableModel.fireTreeStructureChanged(DefaultBGTreeTableModel.java:149)
                at ru.bitel.common.client.tree.BGCheckTreeModel.setChecked(BGCheckTreeModel.java:144)
                at ru.bitel.common.client.tree.BGUCheckTree.setChecked(BGUCheckTree.java:62)
                at ru.bitel.oss.systems.inventory.resource.client.device.DeviceFilter.setDeviceGroupIds(DeviceFilter.java:181)
                at ru.bitel.bgbilling.modules.inet.api.client.InetDevicePanel.setFilter(InetDevicePanel.java:552)
                at ru.bitel.bgbilling.modules.inet.api.client.contract.InetServForm.onInetServSelected(InetServForm.java:436)
                at ru.bitel.bgbilling.modules.inet.api.client.contract.InetServForm.performActionOpen(InetServForm.java:608)
                at ru.bitel.bgbilling.modules.inet.api.client.contract.InetServForm$11.actionPerformedImpl(InetServForm.java:930)
                at ru.bitel.common.client.AbstractBGUPanel.actionPerformed(AbstractBGUPanel.java:237)
                at ru.bitel.common.client.AbstractBGUPanel$DefaultAction.actionPerformed(AbstractBGUPanel.java:91)
                at ru.bitel.bgbilling.client.common.BGEditor.performAction(BGEditor.java:692)
                at ru.bitel.common.client.AbstractBGUPanel.performAction(AbstractBGUPanel.java:522)
                at ru.bitel.bgbilling.client.common.BGEditor.performAction(BGEditor.java:627)
                at ru.bitel.common.client.AbstractBGUPanel.performAction(AbstractBGUPanel.java:517)
                at ru.bitel.common.client.BGSwingUtilites$2.mouseClicked(BGSwingUtilites.java:376)
                at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source)
                at java.awt.Component.processMouseEvent(Unknown Source)
                at javax.swing.JComponent.processMouseEvent(Unknown Source)
                at java.awt.Component.processEvent(Unknown Source)
                at java.awt.Container.processEvent(Unknown Source)
                at java.awt.Component.dispatchEventImpl(Unknown Source)
                at java.awt.Container.dispatchEventImpl(Unknown Source)
                at java.awt.Component.dispatchEvent(Unknown Source)
                at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
                at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
                at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
                at java.awt.Container.dispatchEventImpl(Unknown Source)
                at java.awt.Window.dispatchEventImpl(Unknown Source)
                at java.awt.Component.dispatchEvent(Unknown Source)
                at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
                at java.awt.EventQueue.access$200(Unknown Source)
                at java.awt.EventQueue$3.run(Unknown Source)
                at java.awt.EventQueue$3.run(Unknown Source)
                at java.security.AccessController.doPrivileged(Native Method)
                at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
                at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
                at java.awt.EventQueue$4.run(Unknown Source)
                at java.awt.EventQueue$4.run(Unknown Source)
                at java.security.AccessController.doPrivileged(Native Method)
                at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
                at java.awt.EventQueue.dispatchEvent(Unknown Source)
                at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
                at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
                at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
                at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
                at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
                at java.awt.EventDispatchThread.run(Unknown Source)