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java.lang.NullPointerException: 	at org.opengts.db.tables.EventData._getKeyFieldString(EventData.java:6566)	at org.opengts.db.tables.EventData.getKeyFieldTitle(EventData.java:5755)	at org.opengts.StartupInit$1.getOptionalEventFieldTitle(StartupInit.java:324)	at org.opengts.db.EventUtil.getParseMapEventJS(EventUtil.java:706)	at org.opengts.db.EventUtil.getParseMapEventJS(EventUtil.java:643)	at org.opengts.war.maps.JSMap.writeJavaScript(JSMap.java:466)	at org.opengts.war.track.page.TrackMap$2.write(TrackMap.java:916)	at org.opengts.war.tools.HTMLOutput.write(HTMLOutput.java:120)	at org.opengts.war.track.taglib.TrackTag.doEndTag(TrackTag.java:576)	at org.apache.jsp.jsp.loginSession_005fbanner_jsp._jspx_meth_gts_005ftrack_005f0(loginSession_005fbanner_jsp.java:484)	at org.apache.jsp.jsp.loginSession_005fbanner_jsp._jspService(loginSession_005fbanner_jsp.java:133)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)	at org.opengts.war.tools.CommonServlet.writePageFrame(CommonServlet.java:283)	at org.opengts.war.track.page.TrackMap.writePage(TrackMap.java:1513)	at org.opengts.war.track.Track._doWork(Track.java:1547)	at org.opengts.war.track.Track._doWork_wrapper(Track.java:424)	at org.opengts.war.track.Track.doGet(Track.java:304)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.opengts.war.track.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:75)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:662)