IllegalArgumentException: null  for SOAP request

I've created a SOAP request for an EAR deployed on WAS 6.1 via RAD 7 (localhost). The EAR contains the Web service project WAR and the target Java project JAR.  I'm using soapUI to send in the request, but I get a IllegalArgumentException: null in the console log. However, the SOAP request has values for all the parameters to rebalance (portfolio, model, and constraints XML doc Strings).  Can anyone tell me what's going wrong?  Thanks, Mark

===== soapUI log =====
INFO:Loaded project from [C:\Documents and Settings\a445576\My Documents\Projects\MAPR\Web service\MAPRWS-soapui-project.xml]
:INFO:Got response for [MaprXmlAdapter.rebalance:Request 1] in 214ms (4664 bytes)

===== soapUI HTTP log =====
 "POST /fmr-pdk-fe-mapr-ws/services/MaprXmlAdapter HTTP/1.1[\r][\n]"
 "Content-Type: text/xml;charset=UTF-8[\r][\n]"
 "SOAPAction: "rebalance"[\r][\n]"
 "User-Agent: Jakarta Commons-HttpClient/3.0.1[\r][\n]"
 "Host: localhost:8881[\r][\n]"
 "Content-Length: 6293[\r][\n]"
 "[\r][\n]"
 "<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:x.="http://xml.client.mapr.fe.pdk.fmr.com">[\n]"
 "   <soapenv:Header/>[\n]"
 "   <soapenv:Body>[\n]"
 "      <x.:rebalance>[\n]"
 "         <customerPortfolioXml><portfolio> ... </portfolio> </customerPortfolioXml>[\n]"
 "         <modelXml><model> ... </model> </modelXml>[\n]"
 "         <parametersXml><constraints> ... </constraints></parametersXml>[\n]"
 "      </x.:rebalance>[\n]"
 "   </soapenv:Body>[\n]"
 "</soapenv:Envelope>"
 "HTTP/1.1 500 Internal Server Error[\r][\n]"
 "Server: WebSphere Application Server/6.1[\r][\n]"
 "Content-Type: text/xml; charset=utf-8[\r][\n]"
 "Content-Length: 4662[\r][\n]"
 "<?xml version='1.0' encoding='UTF-8'?>[\r][\n]"
 "<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">[\r][\n]"
 "<SOAP-ENV:Header xmlns:ns0="admin" ns0:WASRemoteRuntimeVersion="6.1.0.2" ns0:JMXMessageVersion="1.0.0" ns0:JMXVersion="1.2.0">[\r][\n]"
 "</SOAP-ENV:Header>[\r][\n]"
 "<SOAP-ENV:Body>[\r][\n]"
 "<SOAP-ENV:Fault>[\r][\n]"
 "<faultcode>SOAP-ENV:Server</faultcode>[\r][\n]"
 "<faultstring>rO0ABXNyAB1vcmcuYXBhY2hlLnNvYX ... AoAAAA3dAAzY29tLmlib"
 "S53cy5tYW5hZ2VtZW50LmNvb ... 5qYXZhdAADcnVueA==</faultstring>[\r][\n]"
 "<faultactor>/fmr-pdk-fe-mapr-ws/services/MaprXmlAdapter</faultactor>[\r][\n]"
 "</SOAP-ENV:Fault>[\r][\n]"
 "[\r][\n]"
 "</SOAP-ENV:Body>[\r][\n]"
 "</SOAP-ENV:Envelope>[\r][\n]"

===== Console output =====
00000020 SystemErr     R java.lang.IllegalArgumentException: null
Server stack trace
JMXTransformException java.io.EOFException
      at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2247)
      at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2713)
      at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:775)
      at java.io.ObjectInputStream.<init>(ObjectInputStream.java:291)
      at com.ibm.ws.management.connector.interop.JMXObjectInputStream.<init>(JMXObjectInputStream.java:51)
      at com.ibm.ws.management.connector.soap.GenericSerializer.unmarshall(GenericSerializer.java:209)
      at org.apache.soap.util.xml.XMLJavaMappingRegistry.unmarshall(Unknown Source)
      at com.ibm.ws.management.connector.soap.SOAPUtils.extractSoapCall(SOAPUtils.java:145)
      at com.ibm.ws.management.connector.soap.SOAPConnector.service(SOAPConnector.java:112)
      at com.ibm.ws.management.connector.soap.SOAPConnection.handleRequest(SOAPConnection.java:55)
      at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:680)
      at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:484)
      at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1510)

Client stack trace

 00000020 SystemErr     R       at com.ibm.ws.management.connector.soap.GenericSerializer.unmarshall(GenericSerializer.java:228)
 00000020 SystemErr     R       at org.apache.soap.util.xml.XMLJavaMappingRegistry.unmarshall(Unknown Source)
[7/5/08 10:57:29:298 EDT] 00000020 SystemErr     R       at com.ibm.ws.management.connector.soap.SOAPUtils.extractSoapCall(SOAPUtils.java:145)
 00000020 SystemErr     R       at com.ibm.ws.management.connector.soap.SOAPConnector.service(SOAPConnector.java:112)
 00000020 SystemErr     R       at com.ibm.ws.management.connector.soap.SOAPConnection.handleRequest(SOAPConnection.java:55)
 00000020 SystemErr     R       at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:680)
[ 00000020 SystemErr     R       at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:484)
 00000020 SystemErr     R       at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1510)Start Free Trial