Webdyn App doesnt work due to WDTypeNotFoundException, DdException & WebUIE

Question

Hi
My webdynpro application does not work due to the following exception. The stack trace is give below.
But another application accessing another RFC model works. Even if i create a new project using this RFC it wont work.
Please kindly help me regarding this issue.
Environment
NWDS SP 9
ADS  SP 9
STACK TRACE
#1.5#00123F57561D00460000003C00000D7C00040FABD316F9C7#1143130562156#com.sap.engine.services.servlets_jsp.client.RequestInfo#sap.com/tcwddispwda#com.sap.engine.services.servlets_jsp.client.RequestInfo#Guest#2####52122390ba8811dab38100123f57561d#SAPEngine_Application_Thread[impl:3]_39##0#0#Warning##Plain###Cannot send an http error response [500 Application error occurs during processing the request. (details: <pre>com.sap.tc.webdynpro.services.exceptions.WDTypeNotFoundException: type extern:com.test.model.types.AdRFCModel:com.test.model.types.Ztmi_Tdat could not be loaded: com.sap.dictionary.runtime.DdException:
     at com.sap.tc.webdynpro.services.datatypes.core.DataTypeBroker.getStructure&\#40;DataTypeBroker.java:297&\#41;
     at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init&\#40;NodeInfo.java:753&\#41;
     at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init&\#40;NodeInfo.java:761&\#41;
     at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init&\#40;NodeInfo.java:761&\#41;
     at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init&\#40;NodeInfo.java:761&\#41;
     at com.sap.tc.webdynpro.progmodel.context.Context.init&\#40;Context.java:40&\#41;
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init&\#40;Controller.java:199&\#41;
     at com.sap.tc.webdynpro.progmodel.controller.Component.getCustomControllerInternal&\#40;Component.java:433&\#41;
     at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext&\#40;Component.java:371&\#41;
     at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext&\#40;Component.java:400&\#41;
     at com.sap.tc.webdynpro.progmodel.context.AttributeInfo.initAttributeMapping&\#40;AttributeInfo.java:582&\#41;
     at com.sap.tc.webdynpro.progmodel.context.AttributeInfo.init&\#40;AttributeInfo.java:442&\#41;
     at com.sap.tc.webdynpro.progmodel.context.NodeInfo.initAttributes&\#40;NodeInfo.java:771&\#41;
     at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init&\#40;NodeInfo.java:756&\#41;
     at com.sap.tc.webdynpro.progmodel.context.Context.init&\#40;Context.java:40&\#41;
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init&\#40;Controller.java:199&\#41;
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView&\#40;ViewManager.java:540&\#41;
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot&\#40;ViewManager.java:422&\#41;
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.init&\#40;ViewManager.java:130&\#41;
     at com.sap.tc.webdynpro.progmodel.view.InterfaceView.initController&\#40;InterfaceView.java:41&\#41;
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init&\#40;Controller.java:200&\#41;
     at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.displayToplevelComponent&\#40;ClientComponent.java:134&\#41;
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init&\#40;ClientApplication.java:374&\#41;
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute&\#40;WebDynproMainTask.java:593&\#41;
     at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks&\#40;AbstractClient.java:59&\#41;
     at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing&\#40;ClientManager.java:249&\#41;
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing&\#40;DispatcherServlet.java:154&\#41;
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent&\#40;DispatcherServlet.java:116&\#41;
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet&\#40;DispatcherServlet.java:48&\#41;
     at javax.servlet.http.HttpServlet.service&\#40;HttpServlet.java:740&\#41;
     at javax.servlet.http.HttpServlet.service&\#40;HttpServlet.java:853&\#41;
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet&\#40;HttpHandlerImpl.java:385&\#41;
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest&\#40;HttpHandlerImpl.java:263&\#41;
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet&\#40;RequestAnalizer.java:340&\#41;
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet&\#40;RequestAnalizer.java:318&\#41;
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer&\#40;RequestAnalizer.java:821&\#41;
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle&\#40;RequestAnalizer.java:239&\#41;
     at com.sap.engine.services.httpserver.server.Client.handle&\#40;Client.java:92&\#41;
     at com.sap.engine.services.httpserver.server.Processor.request&\#40;Processor.java:147&\#41;
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process&\#40;ApplicationSessionMessageListener.java:37&\#41;
     at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run&\#40;UnorderedChannel.java:71&\#41;
     at com.sap.engine.core.thread.impl3.ActionObject.run&\#40;ActionObject.java:37&\#41;
     at java.security.AccessController.doPrivileged&\#40;Native Method&\#41;
     at com.sap.engine.core.thread.impl3.SingleThread.execute&\#40;SingleThread.java:94&\#41;
     at com.sap.engine.core.thread.impl3.SingleThread.run&\#40;SingleThread.java:162&\#41;
Caused by: com.sap.dictionary.runtime.DdException:
     at com.sap.dictionary.runtime.XmlExtractor.map&\#40;XmlExtractor.java:132&\#41;
     at com.sap.dictionary.runtime.DdJavaProvider.getDataType&\#40;DdJavaProvider.java:68&\#41;
     at com.sap.dictionary.runtime.DdNameTranslator.&\#60;init&\#62;&\#40;DdNameTranslator.java:53&\#41;
     at com.sap.dictionary.runtime.DdNameTranslator.&\#60;init&\#62;&\#40;DdNameTranslator.java:28&\#41;
     at com.sap.dictionary.runtime.DdBroker.getDataType&\#40;DdBroker.java:162&\#41;
     at com.sap.dictionary.runtime.DdBroker.getStructure&\#40;DdBroker.java:180&\#41;
     at com.sap.tc.webdynpro.services.datatypes.core.DataTypeBroker.getStructure&\#40;DataTypeBroker.java:295&\#41;
     ... 44 more
</pre>)]. The error is: com.sap.engine.services.servlets_jsp.server.exceptions.WebIOException: An attempt to write after the stream had been closed.
     at com.sap.engine.services.servlets_jsp.server.runtime.client.GzipResponseStream.write(GzipResponseStream.java:204)
     at com.sap.engine.services.servlets_jsp.server.runtime.client.GzipResponseStream.write(GzipResponseStream.java:188)
     at com.sap.engine.services.servlets_jsp.server.runtime.client.HttpServletResponseFacade.writeError(HttpServletResponseFacade.java:692)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.sendError(HttpHandlerImpl.java:838)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.processError(HttpHandlerImpl.java:768)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:396)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:263)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:340)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:318)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:821)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:239)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:147)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
     at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:94)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)
Thanks
Praveen

Answer 1

Hi,
I have got the solution for this. I have tried recreating(JCO Connections), restarting(SLD Data Supplier, etc.), undeploying(Projects), rebuilding(Projects) and deploying to get rid of this exception. But it did not make any difference.
The main concern with this exception is while re-importing the model where the Netweaver Developer Studio works in a very strange way. It actually shows that it has reimported the model without showing any Deltas(shown in the info window in the last stage while importing the model). While this same application is testing on different machine with same version of NWDS where it actually shows the changed structures in the Deltas info.
So, clean the workspace(back up the projects) including the .METADATA folder(which is very very important) and restart the Netweaver Developer Studio which reinstalls itself and creates new version of .METADATA folder.
Now
1) Reimport the projects into the workspace
2) Reimport the model into the project
3) Restart the J2EE Server (Better undeploying the project using Remote SDM GUI before restarting the J2EE Server)
4) After the server is restarted, then rebuild and redeploy the application. Believe me it works.
Regards
Praveen Tipirneni