I tested the new JBossWS 1.2.0CR3 with a) Eclipse/WTP and the generic "Web Services Explorer" b) The reference implementation for JAX-WS on the client side. There is no problem if the web service doesn't need any input parameter and just returns a result, e.g. a string. However, if the web service's operation needs an input parameter (e.g. a long value) then I get this error message: "Cannot find child element: arg0". Eclipse's Web Services Explorer shows the following as the submitted SOAP message:<?xml version="1.0" encoding="UTF-8" ?> | <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> | <soapenv:Body> | <ns0:findNachname xmlns:ns0="http://ws.hska.de"> | <long_1>1</long_1> | </ns0:findNachname> | </soapenv:Body> | </soapenv:Envelope> And the following code as the returned SOAP message:<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"> | <env:Header /> | <env:Body> | <env:Fault> | <faultcode>env:Server</faultcode> | <faultstring>Cannot find child element: arg0</faultstring> | </env:Fault> | </env:Body> | </env:Envelope> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4018875#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...