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How To Fix WD065 - Source and target nodes must be different


SAP Error Message - Details

  • Message type: E = Error

  • Message class: WD - Workflow definition

  • Message number: 065

  • Message text: Source and target nodes must be different

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  • What is the cause and solution for SAP error message WD065 - Source and target nodes must be different ?

    Certainly! Here's a detailed explanation of the SAP error message WD065: "Source and target nodes must be different" including its cause, solution, and related information.


    SAP Error Message: WD065 - "Source and target nodes must be different"


    Cause:

    This error occurs in Web Dynpro ABAP applications when you try to create a navigation link or perform a navigation action where the source node and the target node are the same. In other words, the framework expects that the navigation should happen between two different nodes in the component controller or context, but the source and target nodes specified are identical.

    This typically happens in scenarios such as:

    • Defining navigation links in the context mapping where the source and target nodes are mistakenly set to the same node.
    • In component usage or component controller context mapping, when the developer tries to map a node to itself.
    • When performing navigation programmatically and the source and target nodes are not properly distinguished.

    Explanation:

    In Web Dynpro, nodes represent context elements (like data containers). Navigation between nodes is used to transfer data or trigger UI changes. Navigating from a node to itself is logically incorrect because it implies no change or movement in the context structure, which the framework does not allow.


    Solution:

    To resolve the WD065 error, you need to ensure that the source node and target node are different. Here are the steps to fix it:

    1. Check Context Mapping:

      • Go to the context mapping in your Web Dynpro component or component usage.
      • Verify that the source node and target node are not the same.
      • If they are the same, change the target node to the correct different node.
    2. Review Navigation Links:

      • In the Web Dynpro component, check the navigation links defined between views or components.
      • Make sure the navigation link does not point from a node to itself.
    3. Programmatic Navigation:

      • If navigation is done via ABAP code (e.g., wd_context->get_child_node() or wd_this->fire_navigation()), verify that the source and target nodes are different.
      • Adjust the code to navigate to a different node.
    4. Context Node Design:

      • Sometimes the design of the context nodes might be incorrect or redundant.
      • Reconsider the context structure to avoid having identical nodes used as both source and target.

    Example Scenario:

    Suppose you have a context node Employee and you try to create a navigation link from Employee to Employee itself. This will trigger WD065 because the framework expects navigation to a different node, such as EmployeeDetails or EmployeeAddress.


    Related Information:

    • Message Class: WD (Web Dynpro)
    • Message Number: 065
    • Where it occurs: Web Dynpro ABAP context mapping, navigation link definition, or programmatic navigation.
    • SAP Notes: Check SAP Notes related to Web Dynpro context navigation if the problem persists.
    • Documentation: SAP Help Portal for Web Dynpro ABAP context and navigation.

    Summary:

    Aspect Description
    Error WD065: Source and target nodes must be different
    Cause Navigation or context mapping uses the same node as source and target
    Solution Ensure source and target nodes are different in context mapping or navigation links
    Where to check Context mapping, navigation links, ABAP code in Web Dynpro components

    If you provide the specific context or code snippet where this error occurs, I can help you with a more tailored solution.

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