I've just started to investigating the JBoss jBPM/BPEL piece (so please excuse me if my use of the terminology is a little flaky) and I'm trying to adapt it to work with the following complex message type (SWMSubmission):

 <types>

 <schema targetNamespace="urn:samples:swmessage" xmlns="http://www.w3.org/2001/XMLSchema">

 <complexType name="SWMKeyValuePair">
 <sequence>
 <element name="swmName" type="xsd:string" minOccurs="1" maxOccurs="1"/>
 <element name="swmValue" type="xsd:string" minOccurs="1" maxOccurs="1"/>
 </sequence>
 </complexType>

 <complexType name="SWMSubmission">
 <sequence>
 <element name="swmEventName" type="xsd:string" minOccurs="1" maxOccurs="1"/>
 <element name="swmEventData" type="typ:SWMKeyValuePair" minOccurs="1" maxOccurs="unbounded"/>
 </sequence>
 </complexType>

 </schema>

 </types>

In my bpel process document I declare a variable:

 <variable name="swmSubmission" messageType="swm:swmSubmission" />

and attempt to assign values to it:

 <assign name="fillSWMessage">
 <copy>
 <from variable="balanceChange" part="customerName" />
 <to variable="swmSubmission" part="body"
 query="/body/swmEventName" />
 </copy>
 <copy>
 <from variable="balanceChange" part="customerName"/>
 <to variable="swmSubmission" part="body"
 query="/body/swmEventData[1]/swmName" />
 </copy>
 <copy>
 <from variable="balanceChange" part="customerName" />
 <to variable="swmSubmission" part="body"
 query="/body/swmEventData[1]/swmValue" />
 </copy>
 </assign>

When fully deployed and the service invoked I get an error. If I remove the parts of the 'assign' that access the (possible) multiple elements then everything works:

 <assign name="fillSWMessage">
 <copy>
 <from variable="balanceChange" part="customerName" />
 <to variable="swmSubmission" part="body"
 query="/body/swmEventName" />
 </copy>
 </assign>

so I'm assuming I've made some basic error in my use of this complex type somewhere. The error I get is shown below:

2006-11-01 10:47:00,462 DEBUG [org.jboss.ws.server.ServiceEndpoint] Outgoing SOAPMessage
<env:Envelope xmlns:env='http://schemas.xmlsoap.org/soap/envelope/'>
 <env:Header/>
 <env:Body>
 <env:Fault>
 <faultcode>env:Server</faultcode>
 <faultstring>The service is not in an appropiate state for the requested operation</faultstring>
 </env:Fault>
 </env:Body>
</env:Envelope>
2006-11-01 10:47:00,462 ERROR [org.jboss.ws.server.ServiceEndpoint] Cannot process metrics
java.lang.ClassCastException: org.jboss.ws.soap.SOAPBodyElementDoc
 at org.jboss.ws.soap.SOAPBodyImpl.getFault(SOAPBodyImpl.java:121)
 at org.jboss.ws.server.ServiceEndpoint.handleRequest(ServiceEndpoint.java:262)
 at org.jboss.ws.server.ServiceEndpointServlet.doPost(ServiceEndpointServlet.java:120)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
 at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
 at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
 at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
 at java.lang.Thread.run(Thread.java:595)

but this seems to be the response to any kind of problem (in fact I get this error intermittently using the tutorial as boxed).

I wasn't sure whether indexing of swmEventData should start at 0 or 1 so I tried them both with no joy. Is there some sort of intialisation I should be doing? Any help would be appreciated.