Changes for page Lifelong Learning Document Tool
Last modified by Simon Rath on 2022/05/15 21:02
Error number 4001 in 4: Error while evaluating velocity template changesdoc.vm
Error number 4001 in 4: Error while evaluating velocity template changesdoc.vm com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while evaluating velocity template changesdoc.vm at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2511) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2484) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:983) at jdk.internal.reflect.GeneratedMethodAccessor210.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:565) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:548) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:219) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:490) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.Template.merge(Template.java:358) at org.apache.velocity.Template.merge(Template.java:262) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:284) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:316) at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:267) at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:267) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:250) at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2506) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2484) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:983) at jdk.internal.reflect.GeneratedMethodAccessor210.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:565) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:548) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:219) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:490) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.Template.merge(Template.java:358) at org.apache.velocity.Template.merge(Template.java:262) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:284) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:316) at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:267) at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:267) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:250) at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2506) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2484) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:983) at jdk.internal.reflect.GeneratedMethodAccessor210.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:565) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:548) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:219) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:490) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:191) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:191) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.Template.merge(Template.java:358) at org.apache.velocity.Template.merge(Template.java:262) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:284) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:316) at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:267) at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:267) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:250) at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2506) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2484) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:983) at jdk.internal.reflect.GeneratedMethodAccessor210.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:565) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:548) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:219) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:490) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.Template.merge(Template.java:358) at org.apache.velocity.Template.merge(Template.java:262) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:284) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:316) at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:267) at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:267) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:250) at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2506) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:576) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:250) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:109) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132) 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:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:688) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:747) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:351) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:375) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1594) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: org.xwiki.rendering.RenderingException: Failed to execute renderer at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:270) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:250) at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2506) ... 197 more Caused by: org.xwiki.rendering.RenderingException: Failed to evaluate template with id [/templates/changesdoc.vm] at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:219) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:267) at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98) at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:267) ... 205 more Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with namespace [/templates/print.vm] at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:292) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:316) at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95) at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217) ... 211 more Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'createAttachmentReference' in class org.xwiki.model.script.ModelScriptService threw exception java.lang.IllegalArgumentException: An Entity Reference name cannot be null or empty at /templates/print.vm[line 445, column 36] at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:306) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:233) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:701) at org.apache.velocity.runtime.parser.node.ASTMap.value(ASTMap.java:82) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:72) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:165) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:701) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:72) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:240) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.Foreach.renderBlock(Foreach.java:306) at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:276) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:215) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:328) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:258) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:301) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:144) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:172) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423) at org.apache.velocity.Template.merge(Template.java:358) at org.apache.velocity.Template.merge(Template.java:262) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:284) ... 214 more Caused by: java.lang.IllegalArgumentException: An Entity Reference name cannot be null or empty at org.xwiki.model.reference.EntityReference.setName(EntityReference.java:215) at org.xwiki.model.reference.EntityReference.<init>(EntityReference.java:155) at org.xwiki.model.reference.AttachmentReference.<init>(AttachmentReference.java:80) at org.xwiki.model.script.ModelScriptService.createAttachmentReference(ModelScriptService.java:296) at jdk.internal.reflect.GeneratedMethodAccessor535.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:565) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:548) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:219) ... 248 more