Fault message with 'Server error'

Hi all,

I have the following problem in PI.

The scenario is a synchronous interface, in which messages are send to PI using SOAP adapter. These are sent by proxy to ECC, and afterwards a reponse message is sent back.

So it's a SOAP-Proxy scenario with a synchronous interface and a request/response message.

I'm testing this interface using SOAPUI.

In PI the request and response messages are processed succesfully, however in SOAPUI I get the following error message (fault message), which is also shown in the communication channel logging.

<!--see
the documentation-->

  <SOAP:Envelope xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/">

   <SOAP:Body>

     <SOAP:Fault>

       <faultcode>SOAP:Server</faultcode>

       <faultstring>Server Error</faultstring>

       <detail>

          <s:SystemError xmlns:s="http://sap.com/xi/WebService/xi2.0">

              <context>XIAdapter</context>

              <code>ADAPTER.JAVA_EXCEPTION</code>

              <text>java.lang.ClassCastException

The fault message contains the error: Server Error.

Does anyone have an idea what causes this?

Thanks in advance any help!

Regards,

Marco