IOException: no entry name specified when exporting jasper report as PDF

I’m trying to run a Jasper report from a screen. I have created a Popup Button with two output format options: PDF and DOCX. The report outputs just fine with DOCX, however, running the same report (jrxml) with the PDF output format I get the error ‘IOException: no entry name specified when exporting report as PDF’

I’m using platform-6.7.6. Below the stacktrace .

java.io.IOException: no entry name specified
	at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:155)
	at java.net.URL.openStream(URL.java:1045)
	at net.sf.jasperreports.engine.util.JRLoader.getInputStream(JRLoader.java:339)
	at net.sf.jasperreports.repo.DefaultRepositoryService.getInputStream(DefaultRepositoryService.java:111)
	at net.sf.jasperreports.repo.InputStreamPersistenceService.load(InputStreamPersistenceService.java:45)
	at net.sf.jasperreports.repo.DefaultRepositoryService.getResource(DefaultRepositoryService.java:149)
	at net.sf.jasperreports.repo.RepositoryUtil.findInputStream(RepositoryUtil.java:190)
	at net.sf.jasperreports.repo.RepositoryUtil.getBytesFromLocation(RepositoryUtil.java:206)
	at net.sf.jasperreports.engine.export.JRPdfExporter.getFont(JRPdfExporter.java:2316)
	at net.sf.jasperreports.engine.export.JRPdfExporter.getChunk(JRPdfExporter.java:2106)
	at net.sf.jasperreports.engine.export.JRPdfExporter.getPhrase(JRPdfExporter.java:2075)
	at net.sf.jasperreports.engine.export.SimplePdfTextRenderer.getPhrase(SimplePdfTextRenderer.java:64)
	at net.sf.jasperreports.engine.export.SimplePdfTextRenderer.render(SimplePdfTextRenderer.java:72)
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportText(JRPdfExporter.java:2435)
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportElements(JRPdfExporter.java:1094)
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportPage(JRPdfExporter.java:1053)
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:917)
	at net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:537)
	at com.haulmont.yarg.formatters.impl.JasperFormatter.printReport(JasperFormatter.java:66)
	at com.haulmont.yarg.formatters.impl.JasperFormatter.renderDocument(JasperFormatter.java:46)
	at com.haulmont.yarg.reporting.Reporting.generateReport(Reporting.java:133)
	at com.haulmont.yarg.reporting.Reporting.runReport(Reporting.java:100)
	at com.haulmont.yarg.reporting.Reporting.runReport(Reporting.java:83)
	at com.haulmont.reports.ReportingBean.createReportDocument(ReportingBean.java:315)
	at com.haulmont.reports.ReportingBean.createReportDocument(ReportingBean.java:284)
	at com.haulmont.reports.ReportingBean.createReport(ReportingBean.java:202)
	at com.haulmont.reports.ReportServiceBean.createReport(ReportServiceBean.java:50)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
	at com.haulmont.cuba.core.sys.ServiceInterceptor.aroundInvoke(ServiceInterceptor.java:117)
	at sun.reflect.GeneratedMethodAccessor163.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
	at com.sun.proxy.$Proxy278.createReport(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.haulmont.cuba.core.sys.remoting.LocalServiceInvokerImpl.invoke(LocalServiceInvokerImpl.java:94)
	at com.haulmont.cuba.web.sys.remoting.LocalServiceProxy$LocalServiceInvocationHandler.invoke(LocalServiceProxy.java:148)
	at com.sun.proxy.$Proxy58.createReport(Unknown Source)
	at com.haulmont.reports.gui.ReportGuiManager.getReportResult(ReportGuiManager.java:266)
	at com.haulmont.reports.gui.ReportGuiManager.printReportSync(ReportGuiManager.java:235)
	at com.haulmont.reports.gui.ReportGuiManager.printReportSync(ReportGuiManager.java:220)
	at com.haulmont.reports.gui.ReportGuiManager.printReport(ReportGuiManager.java:151)
	at nl.intus.niko.web.project.ProjectEdit.onHourUsageReportClick(ProjectEdit.java:388)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.haulmont.cuba.gui.xml.DeclarativeAction.actionPerform(DeclarativeAction.java:84)
	at com.haulmont.cuba.web.gui.components.WebPopupButton$PopupActionWrapper.actionPerform(WebPopupButton.java:365)
	at com.haulmont.cuba.web.gui.components.WebButton.performAction(WebButton.java:44)
	at com.haulmont.cuba.web.gui.components.WebButton.lambda$new$61446b05$1(WebButton.java:36)
	at sun.reflect.GeneratedMethodAccessor307.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:200)
	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:163)
	at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1037)
	at com.vaadin.ui.Button.fireClick(Button.java:377)
	at com.haulmont.cuba.web.toolkit.ui.CubaButton.fireClick(CubaButton.java:54)
	at com.vaadin.ui.Button$1.click(Button.java:54)
	at sun.reflect.GeneratedMethodAccessor335.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158)
	at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:119)
	at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:444)
	at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:409)
	at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:274)
	at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
	at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41)
	at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1436)
	at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:361)
	at com.haulmont.cuba.web.sys.CubaApplicationServlet.serviceAppRequest(CubaApplicationServlet.java:301)
	at com.haulmont.cuba.web.sys.CubaApplicationServlet.service(CubaApplicationServlet.java:192)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at com.haulmont.cuba.web.sys.CubaHttpFilter.handleNotFiltered(CubaHttpFilter.java:116)
	at com.haulmont.cuba.web.sys.CubaHttpFilter.doFilter(CubaHttpFilter.java:103)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)

Below the code in the screen controller to start the report

private void onHourUsageReportClick(String outputFormat) {

	LocalDate localDate = ProjectActivityMonthDatePicker.getValue().toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
	BigDecimal quarter = BigDecimal.valueOf(localDate.getMonthValue()).divide(BigDecimal.valueOf(3),0, RoundingMode.UP);
	
	Map<String,Object> reportParams = new HashMap<>();
	reportParams.put("projectName", this.getItem());
	reportParams.put("Month", localDate.getMonthValue());
	reportParams.put("Year", localDate.getYear());
	reportParams.put("Quarter", quarter.intValue());
	
	String reportName = "Customer Report";
	
	LoadContext<Report> lContext = new LoadContext<>(Report.class)
		.setQuery(LoadContext.createQuery("select r from report$Report r where r.name = :reportName")
			.setParameter("reportName", reportName)
		);
	Report report = dataService.load(lContext);
	
	String templateCode;
	switch (outputFormat) {
		case "PDF": templateCode="PDF"; break;
		case "DOCX": templateCode="DOCX"; break;
		default: templateCode="PDF";
	}
	String fileName = "Projectrapportage-" + getItem().getCustomer().getInternalName() + "-" + localDate.getYear() + "-" + localDate.getMonthValue();
	if (report != null) {
		reportGuiManager.printReport(report, reportParams,templateCode,fileName);
	} else {
		showNotification("Report " + reportName + " not available");
	}
}

Any ideas?