javax.xml.transform.TransformerException: java.lang.NullPointerException

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java.lang.NullPointerException
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javax.xml.transform.TransformerException: java.lang.NullPointerException
at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:265)
at org.apache.xml.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:205)
at org.apache.xml.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:291)
at org.apache.xml.serializer.ToXMLSAXHandler.startPrefixMapping(ToXMLSAXHandler.java:349)
at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:623)
at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336)
at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682)
at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177)
at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177)
at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177)
at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177)
at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177)
at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336)
at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2202)
at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1276)
at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:673)
at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1192)
at com.atosorigin.cacc.ir.webapp.exporter.PDFGenerator.generatePDF(PDFGenerator.java:105)
at com.atosorigin.cacc.ir.webapp.pages.transaction.TransactionList.exportSelectionPDF(TransactionList.java:199)
at com.atosorigin.cacc.ir.webapp.pages.transaction.TransactionList.onSubmitFromTransactionGridForm(TransactionList.java:169)
at com.atosorigin.cacc.ir.webapp.pages.transaction.TransactionList.dispatchComponentEvent(TransactionList.java)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:902)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1081)
at org.apache.tapestry5.internal.structure.InternalComponentResourcesImpl.triggerContextEvent(InternalComponentResourcesImpl.java:263)
at org.apache.tapestry5.corelib.components.Form._$advised$onAction(Form.java:405)
at org.apache.tapestry5.corelib.components.Form$onAction$invocation_1316ffc57d1.invokeAdvisedMethod(Form$onAction$invocation_1316ffc57d1.java)
at org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:71)
at org.apache.tapestry5.ioc.internal.services.LoggingAdvice.advise(LoggingAdvice.java:37)
at org.apache.tapestry5.internal.transform.LogWorker$1.advise(LogWorker.java:54)
at org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:80)
at org.apache.tapestry5.corelib.components.Form.onAction(Form.java)
at org.apache.tapestry5.corelib.components.Form.dispatchComponentEvent(Form.java)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:910)
at org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1081)
at org.apache.tapestry5.internal.services.ComponentEventRequestHandlerImpl.handle(ComponentEventRequestHandlerImpl.java:75)
at org.apache.tapestry5.internal.services.ImmediateActionRenderResponseFilter.handle(ImmediateActionRenderResponseFilter.java:42)
at undefined.$ComponentEventRequestHandler_1316ffc2a03.handle($ComponentEventRequestHandler_1316ffc2a03.java)
at org.apache.tapestry5.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
at undefined.$ComponentEventRequestHandler_1316ffc2a03.handle($ComponentEventRequestHandler_1316ffc2a03.java)
at org.apache.tapestry5.services.TapestryModule$36.handle(TapestryModule.java:2164)
at undefined.$ComponentEventRequestHandler_1316ffc2a03.handle($ComponentEventRequestHandler_1316ffc2a03.java)
at undefined.$ComponentEventRequestHandler_1316ffc2a00.handle($ComponentEventRequestHandler_1316ffc2a00.java)
at org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handleComponentEvent(ComponentRequestHandlerTerminator.java:43)
at undefined.$ComponentRequestHandler_1316ffc2988.handleComponentEvent($ComponentRequestHandler_1316ffc2988.java)
at org.apache.tapestry5.internal.services.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:46)
at undefined.$Dispatcher_1316ffc298a.dispatch($Dispatcher_1316ffc298a.java)
at undefined.$Dispatcher_1316ffc2981.dispatch($Dispatcher_1316ffc2981.java)
at org.apache.tapestry5.services.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:245)
at org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
at undefined.$RequestHandler_1316ffc2982.service($RequestHandler_1316ffc2982.java)
at org.apache.tapestry5.services.TapestryModule$4.service(TapestryModule.java:778)
at undefined.$RequestHandler_1316ffc2982.service($RequestHandler_1316ffc2982.java)
at org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:767)
at undefined.$RequestHandler_1316ffc2982.service($RequestHandler_1316ffc2982.java)
at org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:85)
at undefined.$RequestHandler_1316ffc2982.service($RequestHandler_1316ffc2982.java)
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:90)
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:81)
at org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:85)
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:103)
at undefined.$RequestHandler_1316ffc2982.service($RequestHandler_1316ffc2982.java)
at undefined.$RequestHandler_1316ffc2978.service($RequestHandler_1316ffc2978.java)
at org.apache.tapestry5.services.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:197)
at org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:53)
at undefined.$HttpServletRequestHandler_1316ffc297a.service($HttpServletRequestHandler_1316ffc297a.java)
at org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
at undefined.$HttpServletRequestFilter_1316ffc2977.service($HttpServletRequestFilter_1316ffc2977.java)
at undefined.$HttpServletRequestHandler_1316ffc297a.service($HttpServletRequestHandler_1316ffc297a.java)
at org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:726)
at undefined.$HttpServletRequestHandler_1316ffc297a.service($HttpServletRequestHandler_1316ffc297a.java)
at undefined.$HttpServletRequestHandler_1316ffc2975.service($HttpServletRequestHandler_1316ffc2975.java)
at org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:127)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at java.lang.Thread.run(Thread.java:619)

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