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org.apache.wicket.WicketRuntimeException: Exception in rendering component: [MarkupContainer [Component id = rowsContainerBody]]
at org.apache.wicket.Component.renderComponent(Component.java:2764)
at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1559)
at org.apache.wicket.Component.render(Component.java:2525)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1461)
at org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1624)
at org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1548)
at org.apache.wicket.Component.renderComponent(Component.java:2725)
at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1559)
at com.servoy.j2db.server.headlessclient.dataui.WebCellBasedView.onRender(WebCellBasedView.java:2890)
at org.apache.wicket.Component.render(Component.java:2525)
at org.apache.wicket.Component.renderComponent(Component.java:2666)
at org.apache.wicket.ajax.AjaxRequestTarget.respondComponent(AjaxRequestTarget.java:876)
at org.apache.wicket.ajax.AjaxRequestTarget.respondComponents(AjaxRequestTarget.java:680)
at org.apache.wicket.ajax.AjaxRequestTarget.respond(AjaxRequestTarget.java:590)
at org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)
at com.servoy.j2db.server.headlessclient.WebClientsApplication$8.respond(WebClientsApplication.java:708)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1287)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1358)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1465)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
at com.servoy.j2db.server.servlets.Zt.doGet(Zt.java:16)
at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: the render iterator returned null for a child
at org.apache.wicket.markup.repeater.AbstractRepeater.onRender(AbstractRepeater.java:100)
at org.apache.wicket.Component.render(Component.java:2525)
at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1461)
at org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1624)
at org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1548)
at org.apache.wicket.Component.renderComponent(Component.java:2725)
... 37 more