Analytic Engine Error. null

hi all,

getting below error while clicking on Monitoring------------>Analytics Overview,using mws console,i ahve created KPI and events in MWS and started clicking Monitoring------------>Analytics and given below error

Attached the file error in MWS Console

(OPTIMIZE) [AE.MonitorService.] 2010-03-03 16:37:57.136 CET ERROR: Message not found for messageKey ‘’
(OPTIMIZE) [AE.MonitorService.] 2010-03-03 16:37:57.136 CET ERROR: java.lang.NullPointerException: null
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.buildTreeNode(OverviewTreeFactory.java:120)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.transformCustomTree(OverviewTreeFactory.java:82)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.transformCustomTree(OverviewTreeFactory.java:88)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.transformCustomTree(OverviewTreeFactory.java:88)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.buildStaticTree(OverviewTreeFactory.java:71)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.buildTree(OverviewTreeFactory.java:39)
at com.webmethods.optimize.ui.tree.TreeFactory.createOverviewTree(TreeFactory.java:44)
at com.webmethods.optimize.ui.tree.TreeRegistry.getOverviewTree(TreeRegistry.java:25)
at com.webmethods.optimize.service.monitor.MonitorService.getAnalyticsOverview(MonitorService.java:869)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at electric.util.reflect.Invocation.execute(Invocation.java:85)
at electric.util.reflect.Invocation.invoke(Invocation.java:30)
at electric.service.object.ObjectService.invoke(ObjectService.java:651)
at electric.service.instrumentation.InstrumentingReference.invoke(InstrumentingReference.java:85)
at electric.proxy.chain.ReferenceChain.invoke(ReferenceChain.java:142)
at electric.soap.local.handlers.service.SOAPToServiceHandler.invoke(SOAPToServiceHandler.java:126)
at electric.soap.local.handlers.service.SOAPToServiceHandler.handle(SOAPToServiceHandler.java:66)
at com.webmethods.soap.module.SOAPModuleHandler.handle(SOAPModuleHandler.java:134)
at electric.soap.handlers.interceptor.SOAPInterceptorHandler.handle(SOAPInterceptorHandler.java:64)
at electric.soap.handlers.logging.SOAPLoggingHandler.handle(SOAPLoggingHandler.java:63)
at electric.soap.handlers.setup.SetupHandler.handleRequest(SetupHandler.java:168)
at electric.soap.handlers.setup.SetupHandler.handle(SetupHandler.java:138)
at electric.soap.http.handler.HTTPToSOAP.service(HTTPToSOAP.java:160)
at electric.server.http.ServletServer.service(ServletServer.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at electric.servlet.Config.service(Config.java:311)
at electric.servlet.HTTPContext.service(HTTPContext.java:1041)
at electric.servlet.ServletEngine.service(ServletEngine.java:74)
at electric.webserver.WebServer.service(WebServer.java:160)
at electric.net.socket.SocketServer.run(SocketServer.java:184)
at electric.net.socket.SocketRequest.run(SocketRequest.java:45)
at electric.util.thread.ThreadPool.run(ThreadPool.java:231)
at java.lang.Thread.run(Thread.java:619)
(OPTIMIZE) [AE.GlueExceptionInterceptor.UnknownKey] 2010-03-03 16:37:57.199 CET ERROR: Glue SOAP Exception:
<n1:RuntimeException xsi:type=‘n1:NullPointerException’>

java.lang.NullPointerException
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.buildTreeNode(OverviewTreeFactory.java:120)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.transformCustomTree(OverviewTreeFactory.java:82)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.transformCustomTree(OverviewTreeFactory.java:88)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.transformCustomTree(OverviewTreeFactory.java:88)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.buildStaticTree(OverviewTreeFactory.java:71)
at com.webmethods.optimize.ui.tree.OverviewTreeFactory.buildTree(OverviewTreeFactory.java:39)
at com.webmethods.optimize.ui.tree.TreeFactory.createOverviewTree(TreeFactory.java:44)
at com.webmethods.optimize.ui.tree.TreeRegistry.getOverviewTree(TreeRegistry.java:25)
at com.webmethods.optimize.service.monitor.MonitorService.getAnalyticsOverview(MonitorService.java:869)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at electric.util.reflect.Invocation.execute(Invocation.java:85)
at electric.util.reflect.Invocation.invoke(Invocation.java:30)
at electric.service.object.ObjectService.invoke(ObjectService.java:651)
at electric.service.instrumentation.InstrumentingReference.invoke(InstrumentingReference.java:85)
at electric.proxy.chain.ReferenceChain.invoke(ReferenceChain.java:142)
at electric.soap.local.handlers.service.SOAPToServiceHandler.invoke(SOAPToServiceHandler.java:126)
at electric.soap.local.handlers.service.SOAPToServiceHandler.handle(SOAPToServiceHandler.java:66)
at com.webmethods.soap.module.SOAPModuleHandler.handle(SOAPModuleHandler.java:134)
at electric.soap.handlers.interceptor.SOAPInterceptorHandler.handle(SOAPInterceptorHandler.java:64)
at electric.soap.handlers.logging.SOAPLoggingHandler.handle(SOAPLoggingHandler.java:63)
at electric.soap.handlers.setup.SetupHandler.handleRequest(SetupHandler.java:168)
at electric.soap.handlers.setup.SetupHandler.handle(SetupHandler.java:138)
at electric.soap.http.handler.HTTPToSOAP.service(HTTPToSOAP.java:160)
at electric.server.http.ServletServer.service(ServletServer.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at electric.servlet.Config.service(Config.java:311)
at electric.servlet.HTTPContext.service(HTTPContext.java:1041)
at electric.servlet.ServletEngine.service(ServletEngine.java:74)
at electric.webserver.WebServer.service(WebServer.java:160)
at electric.net.socket.SocketServer.run(SocketServer.java:184)
at electric.net.socket.SocketRequest.run(SocketRequest.java:45)
at electric.util.thread.ThreadPool.run(ThreadPool.java:231)
at java.lang.Thread.run(Thread.java:619)

</n1:RuntimeException>

regards,
anil kumar e