RFC_ERROR_SYSTEM_FAILURE: The function module "DD_DTEL_GET" cannot be used.

Question

Hi there,
I´m trying to launch NWCE 7.1 Webdynpro applications accessing ABAP function with no success.
The landscape consists of an SAP NWCE 7.1 EHP1 (Trial) and an SAP NW 2004s ABAP (Licensed). NW2004s is configured as Gateway and Message Server for the SLD. I can ping/test JCOs successfully and the SLD seems to work fine. RZ70 and SM59 show no errors in the "R3" side and both systems seem to be well-registered as Technical Systems.
I have done some simple examples in Developer Studio to ensure that the conection between both stacks is going well, but I have allways the same issue regardless using ARFC/ARFC2, new projects/old existing projects, etc.
When I test for first time the application, the following exception is thrown:
Caused by: com.sap.mw.jco.JCO$Exception: (104) RFC_ERROR_SYSTEM_FAILURE: The function module "DD_DTEL_GET" cannot be used for 'remote' calls.
     at com.sap.mw.jco.MiddlewareJRfc.generateJCoException(MiddlewareJRfc.java:456)
     at com.sap.mw.jco.MiddlewareJRfc$Client.execute(MiddlewareJRfc.java:1416)
     at com.sap.mw.jco.JCO$Client.execute(JCO.java:4168)
     at com.sap.mw.jco.JCO$Client.execute(JCO.java:3596)
     at com.sap.mdi.jco6.Destination.execute(Destination.java:29)
     ... 136 more
If I refresh the page the last exception disappears and a new one is thrown:
#2# local/prjWD_Acceso_ABAP/FlightListApp#java.lang.NullPointerException
     at com.sap.mdi.ddtypes.DDDataelement.getDescription(DDDataelement.java:305)
     at com.sap.dictionary.types.mdi.util.TextServices.getDescription(TextServices.java:165)
     at com.sap.dictionary.types.mdi.util.TextServices.getQuickInfo(TextServices.java:145)
     at com.sap.dictionary.runtime.DdDataType$TextService.getQuickInfo(DdDataType.java:220)
     at com.sap.tc.webdynpro.progmodel.context.DataAttributeInfo.getDisplayText(DataAttributeInfo.java:385)
     at com.sap.tc.webdynpro.progmodel.context.DataAttributeInfo.getDisplayText(DataAttributeInfo.java:355)
     at com.sap.tc.webdynpro.progmodel.context.MappedAttributeInfo.getDisplayText(MappedAttributeInfo.java:292)
     at com.sap.tc.webdynpro.progmodel.view.ViewElement._getText(ViewElement.java:818)
     at com.sap.tc.webdynpro.progmodel.view.UIElement.getTooltip(UIElement.java:515)
     at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.InputFieldAdapter$OrdinaryField.getTooltip(InputFieldAdapter.java:8201)
     at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.InputFieldAdapter$OrdinaryField.getParameter(InputFieldAdapter.java:7496)
     at com.sap.tc.ls.renderer.ie6.LSInputFieldRenderer.render(LSInputFieldRenderer.java:160)
     at com.sap.tc.webdynpro.clientimpl.html.renderer.lightspeed.base.LSRenderManager.render(LSRenderManager.java:152)
     at com.sap.tc.webdynpro.clientimpl.html.client.RenderManager.render(RenderManager.java:519)
     at com.sap.tc.webdynpro.clientimpl.html.renderer.lightspeed.base.LSRenderManager.render(LSRenderManager.java:130)
     at com.sap.tc.ls.renderer.ie6.LSColumnLayoutRenderer.renderColumnLayoutCellFragment(LSColumnLayoutRenderer.java:1882)
     at com.sap.tc.ls.renderer.ie6.LSColumnLayoutRenderer.renderColumnLayoutRowFragment(LSColumnLayoutRenderer.java:1715)
     at com.sap.tc.ls.renderer.ie6.LSColumnLayoutRenderer.renderColumnLayoutFragment(LSColumnLayoutRenderer.java:1600)
Then, editing the application in Dev. Studio, if I delete tables and/or single fields binded to model context, the last exception doesn´t appear any more but the application enter in the catch section executing the BAPI call:
     try
          wdContext.currentBapi_Flight_Getlist_InputElement().modelObject().execute();
     catch(Exception ex)
          wdComponentAPI.getMessageManager().reportException("Execute error."+ex.toString()+ex.getMessage());
          StackTraceElement errores[] = ex.getStackTrace();
          String errorSTR = new String();
          for (int i = 0; i < errores.length; i++){
               errorSTR += errores<i>.toString() + "
          wdComponentAPI.getMessageManager().reportException(errorSTR);
     wdComponentAPI.getMessageManager().reportSuccess("After catch.");
     // Resynchronise the data in the context with the data in the model
     wdContext.nodeOutput().invalidate();
The first two exception seem to be related each other, and it is true that FM "DD_DTEL_GET" is not RFC enabled in R3. Should it be RFC enabled?
As far as I know, one of the JCO conectors is used for retrieving metadata, that is, data related to types, lenghts, etc. The FM "DD_DTEL_GET" is used for that kind of operations and the second exception is related to that aswell (com.sap.mdi.ddtypes.DDDataelement.getDescription).
I don´t know what else should I test in order to launch an RFC function from WDJ and the trial version is about to expire!
Does anyone know about any oss note or any other tips related to this issue, please?
I am going to test the conectivity via Visual Composer and see whether it´s possible :S
Let me know if you need anymore info about the situation.
Thanks a lot!

Answer 1

Hi again,
The issue hasn´t been solved yet :(.
After applying Note 1244067 the function module has the RFC flag checked but the Null Pointer exception are still there.
java.lang.NullPointerException
at com.sap.mdi.ddtypes.DDDataelement.getReptext(DDDataelement.java:166)
at com.sap.dictionary.types.mdi.util.TextServices.getColumnLabel(TextServices.java:115)
at com.sap.dictionary.runtime.DdDataType$TextService.getColumnLabel(DdDataType.java:212)
at com.sap.tc.webdynpro.progmodel.context.DataAttributeInfo.getDisplayText(DataAttributeInfo.java:379)
at com.sap.tc.webdynpro.progmodel.context.DataAttributeInfo.getDisplayText(DataAttributeInfo.java:355)
at com.sap.tc.webdynpro.progmodel.view.ViewElement._getText(ViewElement.java:818)
at com.sap.tc.webdynpro.clientserver.uielib.standard.impl.Caption.getText(Caption.java:369)
at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.TableAdapter$HeaderCell.getHeaderText(TableAdapter.java:11441)
at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.TableAdapter$HeaderCell.getParameter(TableAdapter.java:11043)
at com.sap.tc.ls.renderer.ie6.LSSapTableHeaderCellRenderer.renderSapTableHeaderCellFragment_iteration(LSSapTableHeaderCellRenderer.java:2421)
at com.sap.tc.ls.renderer.ie6.LSSapTableRowRenderer.renderSapTableRowFragment(LSSapTableRowRenderer.java:223)
at com.sap.tc.ls.renderer.ie6.LSSapTableRowRenderer.render(LSSapTableRowRenderer.java:122)
at com.sap.tc.webdynpro.clientimpl.html.renderer.lightspeed.base.LSRenderManager.render(LSRenderManager.java:152)
at com.sap.tc.webdynpro.clientimpl.html.client.RenderManager.render(RenderManager.java:519)
at com.sap.tc.webdynpro.clientimpl.html.renderer.lightspeed.base.LSRenderManager.render(LSRenderManager.java:130)
at com.sap.tc.ls.renderer.ie6.LSSapTableDefaultBodyRenderer.renderSapTableDefaultBodyFragment(LSSapTableDefaultBodyRenderer.java:301)
at com.sap.tc.ls.renderer.ie6.LSSapTableDefaultBodyRenderer.render(LSSapTableDefaultBodyRenderer.java:119)
at com.sap.tc.webdynpro.clientimpl.html.renderer.lightspeed.base.LSRenderManager.render(LSRenderManager.java:152)
at com.sap.tc.webdynpro.clientimpl.html.client.RenderManager.render(RenderManager.java:519)
at com.sap.tc.webdynpro.clientimpl.html.renderer.lightspeed.base.LSRenderManager.render(LSRenderManager.java:130)
Language resources data in the webdynpro are: Current locale = "es", Default VM locale = "es_ES". The backend default language is "EN". Could this be a problem in order to retrieve descriptions or any other language dependent data?
Thank you
Vicente.