org.apache.jasper.JasperException: java.lang.NullPointerException

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java.lang.NullPointerException
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 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 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.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.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
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)

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