How To Fix FDT_WD_EXPRESSION018 - Cannot add the node as child node to itself

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_WD_EXPRESSION -

• Message number: 018

• Message text: Cannot add the node as child node to itself

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_WD_EXPRESSION018 - Cannot add the node as child node to itself ?

  The SAP error message FDT_WD_EXPRESSION018 ("Cannot add the node as child node to itself") typically occurs in the context of SAP's Floorplan Manager (FPM) or Web Dynpro applications when there is an attempt to create a recursive relationship in the UI component tree. This means that a node is trying to reference itself as a child, which is not allowed.
  
  Cause:
  
  Recursive Node Reference: The most common cause of this error is that the application logic is attempting to add a node to itself, either directly or indirectly. This can happen due to incorrect configuration or coding in the Web Dynpro component or FPM application.
  Incorrect Data Binding: If the data model or binding is set up incorrectly, it may lead to a situation where the application tries to treat a node as its own child.
  Dynamic UI Changes: If the UI is being modified dynamically (e.g., adding/removing nodes based on user actions), there