Hi, Ok it is actually quite ez to reproduce...
@EventListener(targets="chapterChooser",events="onchange",submitForm="f1",async=true) public void getDistricts(IRequestCycle cycle){ String a = this.getFormA().getChapter(); ArrayList t = new ArrayList(); t = c.getDistricts(a); districtModel = new ValueLabelPropertySelectionModel(t); setDistrictModel(districtModel); cycle.getResponseBuilder().updateComponent("districtChooser"); } I am using firefox browser I notice the problem happen in cycle.getResponseBuilder().updateComponent("districtChooser"); line the fatal exception did not appear after I commented that line... : ( -- View this message in context: http://www.nabble.com/Node-not-found...-any1-%3A%28---helpp-tf2762493.html#a7736559 Sent from the Tapestry - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]