Web Service Action block throws Internal Server Error 500

Please forgive the lengthy message!
Web service Action block authenticates the user as confirmed from the web service logs. Now I get an Internal Server Error 500. Is this a bug in MII? The WS does execute correctly from a .Net Client.
Here is the Message from the error in MII NetWeaver log:
SOAP Invoke Error. Status: 500 Message: Internal Server Error
[EXCEPTION]
java.lang.Exception: Status (500): Internal Server Error
at com.sap.lhcommon.webservice.SoapClient.invoke(SoapClient.java:81)
at com.sap.xmii.bls.executables.actions.webservice.WebServiceActions.callWebService(WebServiceActions.java:319)
at com.sap.xmii.bls.executables.actions.webservice.WebServiceActions.webService(WebServiceActions.java:408)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sap.xmii.bls.engine.DataBufferPayload.execute(DataBufferPayload.java:157)
at com.sap.xmii.bls.engine.ReflectiveAction.doExecute(ReflectiveAction.java:629)
at com.sap.xmii.bls.engine.BaseNode.executeNode(BaseNode.java:195)
at com.sap.xmii.bls.engine.BaseAction.execute(BaseAction.java:75)
at com.sap.xmii.bls.engine.runners.ProductionRunner.runAction(ProductionRunner.java:121)
at com.sap.xmii.bls.executables.sequences.Sequence.execute(Sequence.java:50)
at com.sap.xmii.bls.engine.runners.ProductionRunner.runSequence(ProductionRunner.java:102)
at com.sap.xmii.bls.executables.sequences.Sequence.execute(Sequence.java:59)
at com.sap.xmii.bls.engine.runners.ProductionRunner.runSequence(ProductionRunner.java:102)
at com.sap.xmii.bls.executables.sequences.RootNode.execute(RootNode.java:39)
at com.sap.xmii.bls.engine.TransactionInstance.execute(TransactionInstance.java:879)
at com.sap.xmii.bls.engine.TransactionInstance.run(TransactionInstance.java:586)
at com.sap.xmii.bls.engine.TransactionExecuter.runTransactionInstance(TransactionExecuter.java:613)
at com.sap.xmii.bls.engine.TransactionExecuter.executeFromHttpRequest(TransactionExecuter.java:258)
at com.sap.xmii.servlet.Runner.service(Runner.java:81)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at com.sap.xmii.servlet.ServletRunner.run(ServletRunner.java:80)
at com.sap.xmii.common.LocalServiceConnection.post(LocalServiceConnection.java:137)
at com.sap.xmii.xacute.common.ClientCatalogUtilities.postServiceConnection(ClientCatalogUtilities.java:1946)
at com.sap.xmii.xacute.transaction.TransactionUtilities.ExecuteTransaction(TransactionUtilities.java:432)
at com.sap.xmii.servlet.Catalog.handleExecuteTempTrx(Catalog.java:254)
at com.sap.xmii.servlet.Catalog.service(Catalog.java:210)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.runServlet(FilterChainImpl.java:162)
at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:81)
at com.sap.xmii.system.SecurityFilter.doFilter(SecurityFilter.java:96)
at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:73)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:441)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:291)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:396)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:385)
at com.sap.engine.services.servlets_jsp.filters.DSRWebContainerFilter.process(DSRWebContainerFilter.java:48)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.servlets_jsp.filters.ServletSelector.process(ServletSelector.java:76)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.servlets_jsp.filters.ApplicationSelector.process(ApplicationSelector.java:240)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.WebContainerInvoker.process(WebContainerInvoker.java:78)
at com.sap.engine.services.httpserver.chain.HostFilter.process(HostFilter.java:9)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.ResponseLogWriter.process(ResponseLogWriter.java:60)
at com.sap.engine.services.httpserver.chain.HostFilter.process(HostFilter.java:9)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.DefineHostFilter.process(DefineHostFilter.java:27)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.MonitoringFilter.process(MonitoringFilter.java:29)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.MemoryStatisticFilter.process(MemoryStatisticFilter.java:43)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.DSRHttpFilter.process(DSRHttpFilter.java:42)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.server.Processor.chainedRequest(Processor.java:425)
at com.sap.engine.services.httpserver.server.Processor$FCAProcessorThread.process(Processor.java:250)
at com.sap.engine.services.httpserver.server.rcm.RequestProcessorThread.run(RequestProcessorThread.java:45)
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:109)
at com.sap.engine.core.thread.execution.CentralExecutor$SingleThread.run(CentralExecutor.java:314)
--Steve

Steve,
The 500 error is what we get back from the target server.
This is probably not a bug since I don't think that MII has ever supported the SOAP-Fault node to build the response XML.
Sam
PS: For those of you reading this we had an offline discussion about this.

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