How To Fix SWDP_WDY_MD_ADT011 - Aggregation &1 of UI Element &2 in view &3 may contain only one child

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_WDY_MD_ADT - Web Dynpro Metadata ADT

• Message number: 011

• Message text: Aggregation &1 of UI Element &2 in view &3 may contain only one child

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWDP_WDY_MD_ADT011 - Aggregation &1 of UI Element &2 in view &3 may contain only one child ?

  The SAP error message SWDP_WDY_MD_ADT011 indicates that there is an issue with the structure of a UI element in your SAP Web Dynpro application. Specifically, it states that an aggregation (a collection of child elements) of a UI element can only contain one child element, but it currently contains more than one.
  Cause:
  This error typically arises when you are trying to add multiple child elements to a UI element that is designed to accept only a single child. Common scenarios include:
  
  Using a UI element that is not designed to handle multiple children (e.g., a UIElement that can only have one child).
  Incorrectly configuring the layout or structure of your Web Dynpro component, leading to multiple child elements being added to a single parent element.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the UI Element Configuration:
  
  Check the properties of the UI element that is causing the error. Ensure that it is indeed supposed to have only one child.
  If you need to display multiple items, consider using a different UI element that supports multiple children, such as a Container or a Table.
  
  
  
  Modify the View:
  
  Open the view in the Web Dynpro component where the error occurs.
  Look for the aggregation that is causing the issue and ensure that only one child element is added to it.
  If you have multiple child elements, you may need to restructure your layout to accommodate them properly.
  
  
  
  Check the Data Binding:
  
  If the child elements are being generated dynamically (e.g., through a loop), ensure that the logic correctly limits the number of children to one.
  
  
  
  Test the Changes:
  
  After making the necessary adjustments, test the application to ensure that the error is resolved and that the UI behaves as expected.
  
  
  
  Related Information:
  
  Documentation: Refer to the SAP Web Dynpro documentation for details on UI elements and their properties. This can provide insights into which elements can have multiple children and which cannot.
  SAP Community: Engage with the SAP Community forums for additional support and to see if others have encountered similar issues.
  Debugging: Use the debugging tools available in the SAP Web Dynpro environment to trace the execution and identify where the error is being triggered.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.