Testing a Client Proxy - SOAP Fault Exception caught: : java.lang.NullPointerException

Hello all,

I developed an Application Service in NWDS and tested it in the WebService Navigator.

It worked fine.

Now I want to call this WebService in ABAP. So I created a Client Proxy (SE80) with the corresponding WSDL and set up a logical port (with the same WSDL).

While testing this Client Proxy an error occurred:

SOAP Fault Exception caught: : java.lang.NullPointerException

Through the transaction se11 I got the following infos:

XRFC> TRACE SOAP RUNTIME - trace records                                  <

XRFC>                                                                     <

XRFC> ------------------------------------------------------------------  <

XRFC> E SOAP_RUNTIME 20140213112705.3830210 : CL_SOAP_RUNTIME_CLIENT      <

XRFC> ->EXEC_PROCESSING Exception handling in SOAP runtime                <

XRFC>                                                                     <

XRFC>                                                                     <

XRFC> E HTTP_TRANSPORT_BINDING 20140213112705.3822170 : CL_SOAP_HTTP      <

XRFC> _TPBND_ROOT ->HANDLE_STATUS_CODE Received return code 500 (         <

XRFC> Internal Server Error )                                             <

XRFC>                                                                     <

XRFC>                                                                     <

XRFC> E SOAP_RUNTIME 20140213112705.3830120 : CL_SOAP_RUNTIME_CLIENT      <

XRFC> ->EXEC_PROCESSING SOAP Fault Exception caught: : java.lang          <

XRFC> .NullPointerException                                               <

XRFC>                                                                     <

XRFC> ---------------------------------------------------------------------

XRFC> End of user trace

Can anybody give me a hint how to solve this problem?

Best regards

Paolo