Erro relatório Java e Flex

at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:89)
	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:601)
	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:517)
	at cmx.controller.Imprime_IRPF.processRequest(Imprime_IRPF.java:73)
	at cmx.controller.Imprime_IRPF.doGet(Imprime_IRPF.java:108)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:680)

try {
				reportPrint = JasperFillManager.fillReport(pathModelReport,
						parameters, jrRS);

				reportPrint.setName("Imprime_IRPF");

				reportXML = JasperExportManager.exportReportToXml(reportPrint);

				response.setContentType("text/xml");
				response.setCharacterEncoding("utf-8");
				PrintWriter outputPrintWriter = response.getWriter();

				outputPrintWriter.print(reportXML);