Integration

Hi!
i have plsql procedure and i published it as a web service using JDev 10.1.3, web service is deployed on OC4J 10.1.3. When i call it directly, everything works fine. When i make a BPEL process jast wrapping this web service (receive, assign, invoke, assign, reply - that`s all) the web service is invoked fine without error, but then error appears in the bpel process:

Exception not handled by the Collaxa Cube system. An unhandled exception has been thrown in the Collaxa Cube system. The exception reported is: "java.lang.NullPointerException at com.collaxa.cube.engine.delivery.DeliveryHelper.saveAttachments(DeliveryHelper.java:436) at com.collaxa.cube.ws.wsif.providers.axis.WSIFOperation_ApacheAxis.saveAttachments(WSIFOperation_ApacheAxis.java:3521) at com.collaxa.cube.ws.wsif.providers.axis.WSIFOperation_ApacheAxis.populateOutMsgParts(WSIFOperation_ApacheAxis.java:1403) at com.collaxa.cube.ws.wsif.providers.axis.WSIFOperation_ApacheAxis.buildResponseMessages(WSIFOperation_ApacheAxis.java:1303) at com.collaxa.cube.ws.wsif.providers.axis.WSIFOperation_ApacheAxis.invokeAXISRPCStyle(WSIFOperation_ApacheAxis.java:1815) at com.collaxa.cube.ws.wsif.providers.axis.WSIFOperation_ApacheAxis.invokeRequestResponseOperation(WSIFOperation_ApacheAxis.java:1613) at com.collaxa.cube.ws.wsif.providers.axis.WSIFOperation_ApacheAxis.executeRequestResponseOperation(WSIFOperation_ApacheAxis.java:1083) at com.collaxa.cube.ws.WSIFInvocationHandler.invoke(WSIFInvocationHandler.java:452) at com.collaxa.cube.ws.WSInvocationManager.invoke2(WSInvocationManager.java:327) at com.collaxa.cube.ws.WSInvocationManager.invoke(WSInvocationManager.java:189) at com.collaxa.cube.engine.ext.wmp.BPELInvokeWMP.__invoke(BPELInvokeWMP.java:601) at com.collaxa.cube.engine.ext.wmp.BPELInvokeWMP.__executeStatements(BPELInvokeWMP.java:317) at com.collaxa.cube.engine.ext.wmp.BPELActivityWMP.perform(BPELActivityWMP.java:188) at com.collaxa.cube.engine.CubeEngine.performActivity(CubeEngine.java:3408) at com.collaxa.cube.engine.CubeEngine.handleWorkItem(CubeEngine.java:1836) at com.collaxa.cube.engine.dispatch.message.instance.PerformMessageHandler.handleLocal(PerformMessageHandler.java:75) at com.collaxa.cube.engine.dispatch.DispatchHelper.handleLocalMessage(DispatchHelper.java:166) at com.collaxa.cube.engine.dispatch.DispatchHelper.sendMemory(DispatchHelper.java:252) at com.collaxa.cube.engine.CubeEngine.endRequest(CubeEngine.java:5438) at com.collaxa.cube.engine.CubeEngine.createAndInvoke(CubeEngine.java:1217) at com.collaxa.cube.engine.ejb.impl.CubeEngineBean.createAndInvoke(CubeEngineBean.java:120) at com.collaxa.cube.engine.ejb.impl.CubeEngineBean.syncCreateAndInvoke(CubeEngineBean.java:153) at ICubeEngineLocalBean_StatelessSessionBeanWrapper0.syncCreateAndInvoke(ICubeEngineLocalBean_StatelessSessionBeanWrapper0.java:486) at com.collaxa.cube.engine.delivery.DeliveryHandler.initialRequestAnyType(DeliveryHandler.java:520) at com.collaxa.cube.engine.delivery.DeliveryHandler.initialRequest(DeliveryHandler.java:435) at com.collaxa.cube.engine.delivery.DeliveryHandler.request(DeliveryHandler.java:132) at com.collaxa.cube.ejb.impl.DeliveryBean.request(DeliveryBean.java:101) at IDeliveryBean_StatelessSessionBeanWrapper22.request(IDeliveryBean_StatelessSessionBeanWrapper22.java:479) at com.oracle.bpel.client.delivery.DeliveryService.request(DeliveryService.java:120) at com.oracle.bpel.client.delivery.DeliveryService.request(DeliveryService.java:70) at _ngDoInitiate._jspService(_ngDoInitiate.java:289) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824) at com.evermind.server.http.ServletRequestDispatcher.include(ServletRequestDispatcher.java:121) at com.evermind.server.http.EvermindPageContext.include(EvermindPageContext.java:267) at _displayProcess._jspService(_displayProcess.java:792) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330) at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:222) at com.collaxa.cube.fe.DomainFilter.doFilter(DomainFilter.java:152) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:663) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:224) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:133) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186) at java.lang.Thread.run(Thread.java:534) ". Exception: java.lang.NullPointerException Handled As: com.collaxa.cube.CubeException



i found similar problem calling axis web service, but this web service runs on OC4J ... any suggestions what to do?
Thanks,
Tomas