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java.lang.NullPointerException: 	at com.essbase.eas.essbase.ui.factory.UIFactory.refreshServerPlatform(Unknown Source)	at com.essbase.eas.essbase.ui.factory.FactoryServer.getPlatform(Unknown Source)	at com.essbase.eas.essbase.ui.tree.ServerTreeNode.handleExpand(ServerTreeNode.java:121)	at com.essbase.eas.ui.ctree.CTreeNode.willExpand(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at com.essbase.eas.client.intf.TreeAdapter.treeWillExpand(Unknown Source)	at javax.swing.JTree.fireTreeWillExpand(Unknown Source)	at javax.swing.JTree.setExpandedState(Unknown Source)	at javax.swing.JTree.expandPath(Unknown Source)	at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(Unknown Source)	at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(Unknown Source)	at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(Unknown Source)	at com.jgoodies.looks.plastic.PlasticTreeUI.access$900(PlasticTreeUI.java:120)	at com.jgoodies.looks.plastic.PlasticTreeUI$MouseHandler.mousePressed(PlasticTreeUI.java:276)	at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)	at java.awt.AWTEventMulticaster.mousePressed(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$000(Unknown Source)	at java.awt.EventQueue$1.run(Unknown Source)	at java.awt.EventQueue$1.run(Unknown Source)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)	at java.awt.EventQueue$2.run(Unknown Source)	at java.awt.EventQueue$2.run(Unknown Source)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.AccessControlContext$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)