How To Fix WD290 - Result element of container operation must be entered

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 290

• Message text: Result element of container operation must be entered

What causes this issue?

You have not entered a result element as an element of the Workflow
container for the container operation.

System Response

The definition of the container operation contains errors. The Workflow
definition cannot be executed.

How to fix this error?

Please enter the required container element.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WD290 - Result element of container operation must be entered ?

  Certainly! Here's a detailed explanation of the SAP error message WD290: Result element of container operation must be entered:
  
  Error Message
  WD290: Result element of container operation must be entered
  
  Cause
  This error occurs in Web Dynpro ABAP applications when a container operation (such as a method or action that manipulates the context node) expects a result element to be specified, but it is missing or not provided.
  In Web Dynpro, container operations often require you to specify a result element in the context node where the output or result of the operation will be stored. If this is not done, the framework raises the WD290 error.
  Typical scenarios include:
  
  Calling a context operation (e.g., CREATE, DELETE, INSERT, MODIFY) without specifying the result element.
  Using a method or action that returns a value, but the result is not assigned to any context attribute or node.
  Misconfiguration in the context binding or operation parameters.
  
  
  Solution
  To resolve the WD290 error, you need to ensure that the result element of the container operation is properly specified and assigned.
  Steps to fix:
  
  
  Check the context operation call:
  
  Verify that the operation (e.g., CREATE, MODIFY) has a result element parameter filled.
  For example, when you use CREATE operation on a context node, you must specify the result element where the newly created node will be stored.
  
  
  
  Assign the result element:
  
  In the Web Dynpro component controller or view controller, open the context tab.
  Select the operation and check the Result Element property.
  Assign a context node or attribute to hold the result.
  
  
  
  Check the code or declarative bindings:
  
  
  If you are calling operations programmatically (e.g., in ABAP code), ensure that the result parameter is assigned.
  
  
  Example:
  DATA: lo_node TYPE REF TO if_wd_context_node,
        lo_element TYPE REF TO if_wd_context_element.
  
  lo_node = wd_context->get_child_node( name = 'MyNode' ).
  lo_element = lo_node->create_element( ).
  " lo_element is the result element
  
  
  
  
  Review the Web Dynpro component usage:
  
  If you are using standard components or custom components, check if the operation is correctly configured with the result element.
  
  
  
  
  Related Information
  
  Web Dynpro Context Operations: Operations like CREATE, DELETE, INSERT, MODIFY require a result element to store the outcome.
  SAP Help Portal: Refer to the Web Dynpro ABAP documentation on context operations and context binding.
  Debugging: Use the Web Dynpro debugger to check the context node and operation calls.
  Common Mistake: Forgetting to assign the result element when creating or modifying context nodes.
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Container operation called without specifying the required result element in the context.
  
  
  Solution
  Assign a valid result element (context node or attribute) to the container operation.
  
  
  Where to check
  Context tab in Web Dynpro component, operation properties, and ABAP code calling the operation.
  
  
  
  
  If you provide the specific code snippet or context where the error occurs, I can help you with a more precise fix.