Saxon

Hi all, I've already sent an email with this issue to the support before having access to the portal because of the urgency of the problem, that is a prodution problem. We bought the license for saxon-ee (Order 2010105477) and I’m trying to make saxon work. Our product is installed in different stacks: docker or kubernetes. My account on saxonica is 344dinantone.

We have an issue with the library; below the stack trace error. Attached the xslt and xml that has produced the error. The error is random and happens after, more or less, 200 executions with different data.

The code that produce the error is the following:

    private static void transform(Node doc, Templates xslt, boolean omitXmlDeclaration, Result result) throws CFTransformerException {
        Assert.notNull(doc, "doc cannot be null");
        try {
            Transformer transformer = xslt.newTransformer();
            initTransformerOptions(transformer, omitXmlDeclaration);
            DOMSource source = new DOMSource(doc);
            transformer.transform(source, result);
            Exception ex = XSLT_PARAMS_TL.get().getException();
            if (ex != null) {
                throw new CFTransformerException(ex);
            }
        } catch (TransformerException e) {
            throw new CFTransformerException(e);
        }
    }

The error:
java.lang.RuntimeException: Internal error evaluating template rule  at line 4 in module 
              at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:411) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:551) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.trans.rules.TextOnlyCopyRuleSet.process(TextOnlyCopyRuleSet.java:72) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:524) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.trans.XsltController.applyTemplates(XsltController.java:685) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.s9api.AbstractXsltTransformer.applyTemplatesToSource(AbstractXsltTransformer.java:422) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:355) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.jaxp.TransformerImpl.transform(TransformerImpl.java:75) ~[saxon-ee-11.4.jar:na]
              at com.crif.cf.engine.manager.XSLTTransformer.transform(XSLTTransformer.java:257) ~[classes/:na]
              at com.crif.cf.engine.manager.XSLTTransformer.transform(XSLTTransformer.java:234) ~[classes/:na]
              at com.crif.cf.engine.activity.Activity.transform(Activity.java:364) ~[com.crif.cf.engine.activity-8.0.27.jar:na]
              at com.crif.cf.engine.activity.sync.ActivityMapping.executeInner(ActivityMapping.java:43) ~[com.crif.cf.engine.activity-8.0.27.jar:na]
              at com.crif.cf.engine.activity.ActivityTypeSync.execute(ActivityTypeSync.java:31) ~[com.crif.cf.engine.activity-8.0.27.jar:na]
              at com.crif.cf.engine.process.ProcessContext.executeActivity(ProcessContext.java:855) ~[classes/:na]
              at com.crif.cf.engine.process.ProcessContext.executeActivities(ProcessContext.java:841) ~[classes/:na]
              at com.crif.cf.engine.process.ProcessContext.run(ProcessContext.java:1647) ~[classes/:na]
              at com.crif.cf.engine.ctrl.EngineService.start(EngineService.java:366) ~[classes/:na]
              at com.crif.cf.engine.ctrl.EngineService.execute(EngineService.java:198) ~[classes/:na]
              at com.crif.cf.engine.ctrl.EngineService$$FastClassBySpringCGLIB$$9f09b4c6.invoke(<generated>) ~[classes/:na]
              at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.26.jar:5.3.26]
              at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793) ~[spring-aop-5.3.23.jar:5.3.23]
              at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.3.23.jar:5.3.23]
              at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763) ~[spring-aop-5.3.23.jar:5.3.23]
              at org.springframework.security.access.intercept.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:61) ~[spring-security-core-5.7.5.jar:5.7.5]
              at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.23.jar:5.3.23]
              at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763) ~[spring-aop-5.3.23.jar:5.3.23]
              at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708) ~[spring-aop-5.3.23.jar:5.3.23]
              at com.crif.cf.engine.ctrl.EngineService$$EnhancerBySpringCGLIB$$6cbee763.execute(<generated>) ~[classes/:na]
              at jdk.internal.reflect.GeneratedMethodAccessor940.invoke(Unknown Source) ~[na:na]
              at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:na]
              at java.base/java.lang.reflect.Method.invoke(Unknown Source) ~[na:na]
              at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1071) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:964) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:665) ~[javax.servlet-api-4.0.1.jar:4.0.1]
              at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.23.jar:5.3.23]
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:750) ~[javax.servlet-api-4.0.1.jar:4.0.1]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.68.jar:9.0.68]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:337) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:81) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:122) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:116) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:126) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:81) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:109) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:149) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at com.crif.cf.security.authentication.filter.TokenHeaderAuthenticationFilter.doFilter(TokenHeaderAuthenticationFilter.java:70) ~[com.crif.cf.security-8.0.26.jar:na]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at com.crif.cf.security.reverseproxy.filter.ReverseProxyFilter.doFilter(ReverseProxyFilter.java:48) ~[com.crif.cf.security-8.0.26.jar:na]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at com.crif.cf.security.authentication.filter.CFServiceRequestHeaderFilter.doFilter(CFServiceRequestHeaderFilter.java:43) ~[com.crif.cf.security-8.0.26.jar:na]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:103) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:89) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:112) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:82) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:55) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.session.DisableEncodeUrlFilter.doFilterInternal(DisableEncodeUrlFilter.java:42) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:346) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:221) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:186) ~[spring-security-web-5.7.5.jar:5.7.5]
              at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:354) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:267) ~[spring-web-5.3.23.jar:5.3.23]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.cloud.sleuth.instrument.web.servlet.TracingFilter.doFilter(TracingFilter.java:68) ~[spring-cloud-sleuth-instrumentation-3.1.4.jar:3.1.4]
              at org.springframework.cloud.sleuth.autoconfig.instrument.web.TraceWebServletConfiguration$LazyTracingFilter.doFilter(TraceWebServletConfiguration.java:131) ~[spring-cloud-sleuth-autoconfigure-3.1.4.jar:3.1.4]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96) ~[spring-boot-actuator-2.7.5.jar:2.7.5]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.23.jar:5.3.23]
              at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.23.jar:5.3.23]
              at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.springframework.cloud.sleuth.instrument.web.tomcat.TraceValve.invoke(TraceValve.java:103) ~[spring-cloud-sleuth-instrumentation-3.1.4.jar:3.1.4]
              at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
              at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
Caused by: java.lang.RuntimeException: Internal error evaluating template rule  at line 84 in module 
              at com.saxonica.ee.bytecode.ByteCodeCandidate.process(ByteCodeCandidate.java:162) ~[saxon-ee-11.4.jar:na]
              at com.saxonica.ee.bytecode.ByteCodeCandidate.processLeavingTail(ByteCodeCandidate.java:194) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.NamedTemplate.expand(NamedTemplate.java:266) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.CallTemplate.process(CallTemplate.java:384) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.CallTemplate.processLeavingTail(CallTemplate.java:446) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.Block.processLeavingTail(Block.java:755) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:142) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:357) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:298) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:392) ~[saxon-ee-11.4.jar:na]
              ... 129 common frames omitted
Caused by: java.lang.NullPointerException: null
              at net.sf.saxon.type.StringConverter$StringToString.convert(StringConverter.java:168) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.AtomicSequenceConverter$AtomicSequenceMappingFunction.mapItem(AtomicSequenceConverter.java:347) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.AtomicSequenceConverter$AtomicSequenceMappingFunction.mapItem(AtomicSequenceConverter.java:334) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.expr.ItemMappingIterator.next(ItemMappingIterator.java:161) ~[saxon-ee-11.4.jar:na]
              at com.saxonica.ee.bytecode.GeneratedCode.evaluateItem(GeneratedCode.java:98) ~[saxon-ee-11.4.jar:na]
              at com.saxonica.ee.bytecode.CompiledExpression.evaluateItem(CompiledExpression.java:228) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.value.SingletonClosure.asItem(SingletonClosure.java:78) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.value.SingletonClosure.iterate(SingletonClosure.java:61) ~[saxon-ee-11.4.jar:na]
              at net.sf.saxon.value.Closure.head(Closure.java:129) ~[saxon-ee-11.4.jar:na]
              at EE_let_2502811063482.process(:124) ~[na:na]
              at com.saxonica.ee.bytecode.CompiledExpression.process(CompiledExpression.java:87) ~[saxon-ee-11.4.jar:na]
              at com.saxonica.ee.bytecode.ByteCodeCandidate.process(ByteCodeCandidate.java:149) ~[saxon-ee-11.4.jar:na]
              ... 138 common frames omitted

regards Dino Antonelli