Web Dynpro Callable Object :"Cannot read callable object description "

Question

Hi All,
I'm getting the following error:
"Cannot read callable object description from component"
and also "Cannot read callable object description from component" in two different Web Dynpros.
The code in the Web Dynpros is similar:
try
         IWDTextAccessor textAccessor = wdComponentAPI.getTextAccessor();
         WebDynproResourceAccessor resourceAccessor = new WebDynproResourceAccessor(textAccessor);
         //ITechnicalDescription techDesc = TechnicalDescriptionFactory.newTechnicalDescription("FRESH_PARAMS","Fresh_Parameters To Be Called",resourceAccessor,locale);
          ITechnicalDescription techDesc = TechnicalDescriptionFactory.newTechnicalDescription("FRESH_PARAMS","Fresh",resourceAccessor,locale);
         //Pre-Existing Structure for Input
         IStructureInfo input = techDesc.getInputStructureInfo();
         IAttributeInfo firstName = input.addAttribute("firstName",IAttributeInfo.BASE_STRING);
          IAttributeInfo lastName = input.addAttribute("lastName",IAttributeInfo.BASE_STRING);
          IAttributeInfo phoneNum = input.addAttribute("phoneNum",IAttributeInfo.BASE_STRING);
          IAttributeInfo Place = input.addAttribute("Place",IAttributeInfo.BASE_STRING);
          IAttributeInfo Email = input.addAttribute("Email",IAttributeInfo.BASE_STRING);
          IAttributeInfo Company = input.addAttribute("Company",IAttributeInfo.BASE_STRING);
          //Setting multiplicity
          firstName.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          lastName.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          phoneNum.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          Place.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          Email.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          Company.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          //Pre-Existing Structure for Output
          IStructureInfo output = techDesc.getOutputStructureInfo();
          IStructureInfo userStruct1 = output.addStructure("userStruct1");
          userStruct1.addAttribute("firstName",IAttributeInfo.BASE_STRING);
          userStruct1.addAttribute("lastName",IAttributeInfo.BASE_STRING);
          IStructureInfo userStruct2 = output.addStructure("userStruct2");
          userStruct2.addAttribute("phoneNum",IAttributeInfo.BASE_STRING);
          userStruct2.addAttribute("Place",IAttributeInfo.BASE_STRING);
          userStruct2.addAttribute("Email",IAttributeInfo.BASE_STRING);
          userStruct2.addAttribute("Company",IAttributeInfo.BASE_STRING);
          return techDesc;
    catch (InvocationException ex)
         ex.printStackTrace();
         return null;
Can someone tell me where I'm going wrong.
Thanks
Srikant

Answer 1

Hi Zornista Yankulova
I'm getting  this error:
" Cannot read callable object description from component: Failed to create delegate for custom controller com.infosys.creator.wdpco.COGetDocTypeInterface. (Hint: Is the corresponding DC deployed correctly? Does the DC contain the component?)"
Where the places i can go wrong??
Please let me know.
My code is like this?
public com.sap.caf.eu.gp.co.api.ITechnicalDescription getDescription( java.util.Locale locale )
    //@@begin getDescription()
    try
         IWDTextAccessor textAccessor = wdComponentAPI.getTextAccessor();
         WebDynproResourceAccessor resourceAccessor = new WebDynproResourceAccessor(textAccessor);
         //ITechnicalDescription techDesc = TechnicalDescriptionFactory.newTechnicalDescription("FRESH_PARAMS","Fresh_Parameters To Be Called",resourceAccessor,locale);
          ITechnicalDescription techDesc = TechnicalDescriptionFactory.newTechnicalDescription("FRESH_PARAMS","Fresh",resourceAccessor,locale);
         //Pre-Existing Structure for Input
         IStructureInfo input = techDesc.getInputStructureInfo();
         IAttributeInfo firstName = input.addAttribute("firstName",IAttributeInfo.BASE_STRING);
          IAttributeInfo lastName = input.addAttribute("lastName",IAttributeInfo.BASE_STRING);
          IAttributeInfo phoneNum = input.addAttribute("phoneNum",IAttributeInfo.BASE_STRING);
          IAttributeInfo Place = input.addAttribute("Place",IAttributeInfo.BASE_STRING);
          IAttributeInfo Email = input.addAttribute("Email",IAttributeInfo.BASE_STRING);
          IAttributeInfo Company = input.addAttribute("Company",IAttributeInfo.BASE_STRING);
          //Setting multiplicity
          firstName.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          lastName.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          phoneNum.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          Place.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          Email.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          Company.setMultiplicity(IAttributeInfo.MULITIPLICITY_1_1);
          //Pre-Existing Structure for Output
          IStructureInfo output = techDesc.getOutputStructureInfo();
          IStructureInfo userStruct1 = output.addStructure("userStruct1");
          userStruct1.addAttribute("firstName",IAttributeInfo.BASE_STRING);
          userStruct1.addAttribute("lastName",IAttributeInfo.BASE_STRING);
          IStructureInfo userStruct2 = output.addStructure("userStruct2");
          userStruct2.addAttribute("phoneNum",IAttributeInfo.BASE_STRING);
          userStruct2.addAttribute("Place",IAttributeInfo.BASE_STRING);
          userStruct2.addAttribute("Email",IAttributeInfo.BASE_STRING);
          userStruct2.addAttribute("Company",IAttributeInfo.BASE_STRING);
          return techDesc;
    catch (InvocationException ex)
         ex.printStackTrace();
         return null;
    //@@end
  //@@begin javadoc:execute()
  /** Declared method. */
  //@@end
  public void execute( com.sap.caf.eu.gp.co.api.IExecutionContext executionContext )
    //@@begin execute()
    try
          IWDTextAccessor textAccessor = wdComponentAPI.getTextAccessor();
          WebDynproResourceAccessor resourceAccessor = new WebDynproResourceAccessor(textAccessor);
          this.executionContext = executionContext;
          //Input
          IStructure input = executionContext.getInputStructure();
          String firstName = (String)input.getAttribute("firstName");
          String lastName = (String)input.getAttribute("lastName");
          String phoneNum = (String)input.getAttribute("phoneNum");
          String Email= (String)input.getAttribute("Email");
          String Place = (String)input.getAttribute("Place");
          String Company = (String)input.getAttribute("Company");
          wdContext.nodeInput().currentInputElement().setFirstName(firstName);
          wdContext.nodeInput().currentInputElement().setLastName(lastName);
          wdContext.nodeInput().currentInputElement().setPhoneNum(phoneNum);
          wdContext.nodeInput().currentInputElement().setEmail(Email);
          wdContext.nodeInput().currentInputElement().setPlace(Place);
          wdContext.nodeInput().currentInputElement().setCompany(Company);
          //Output
          IStructure output = executionContext.getOutputStructure();
          String f = wdContext.nodeInput().currentInputElement().getFirstName();
          String l = wdContext.nodeInput().currentInputElement().getLastName();
          String pn = wdContext.nodeInput().currentInputElement().getPhoneNum();
          String e = wdContext.nodeInput().currentInputElement().getEmail();
          String p = wdContext.nodeInput().currentInputElement().getPlace();
          String c = wdContext.nodeInput().currentInputElement().getCompany();
          output.setAttributeValue("firstName",f);
          output.setAttributeValue("lastName",l);
          output.setAttributeValue("phoneNum",pn);
          output.setAttributeValue("Email",e);
          output.setAttributeValue("Place",p);
          output.setAttributeValue("Company",c);
    catch(Exception ex)
         ex.printStackTrace();
    //@@end
  //@@begin javadoc:complete()
  /** Declared method. */
  //@@end
  public void complete( )
    //@@begin complete()
    try
          IWDTextAccessor textAccessor = wdComponentAPI.getTextAccessor();
                    WebDynproResourceAccessor resourceAccessor = new WebDynproResourceAccessor(textAccessor);
          IStructure output = executionContext.getOutputStructure();
          IStructure user1 = output.addStructure("userStruct1");
          IStructure user2 = output.addStructure("userStruct2");
          String f = wdContext.nodeInput().currentInputElement().getFirstName();
                    String l = wdContext.nodeInput().currentInputElement().getLastName();
                    String pn = wdContext.nodeInput().currentInputElement().getPhoneNum();
                    String e = wdContext.nodeInput().currentInputElement().getEmail();
                    String p = wdContext.nodeInput().currentInputElement().getPlace();
                    String c = wdContext.nodeInput().currentInputElement().getCompany();
          user1.setAttributeValue("firstName",f);
          user1.setAttributeValue("lastName",l);
          user2.setAttributeValue("phoneNum",pn);
          user2.setAttributeValue("Email",e);
          user2.setAttributeValue("Place",p);
          user2.setAttributeValue("Company",c);
          executionContext.addResultState("Success");
          executionContext.processingComplete();
    catch(InvocationException e)
         e.printStackTrace();
    catch(EngineException ex)
         ex.printStackTrace();
    //@@end
   * The following code section can be used for any Java code that is
   * not to be visible to other controllers/views or that contains constructs
   * currently not supported directly by Web Dynpro (such as inner classes or
   * member variables etc.). </p>
   * Note: The content of this section is in no way managed/controlled
   * by the Web Dynpro Designtime or the Web Dynpro Runtime.
  //@@begin others
  private IExecutionContext executionContext;
  //@@end
Thanks
Srikant