How To Fix CX_WDK_CONTROLLER302 - Table control - bind only DataSource property to Kayak elements

SAP Error Message - Details

• Message type: E = Error

• Message class: CX_WDK_CONTROLLER - FP/BE/BDC Controller Messages

• Message number: 302

• Message text: Table control - bind only DataSource property to Kayak elements

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CX_WDK_CONTROLLER302 - Table control - bind only DataSource property to Kayak elements ?

  The SAP error message CX_WDK_CONTROLLER302 typically occurs in the context of Web Dynpro applications when there is an issue with the binding of data sources to UI elements, particularly in table controls. This error indicates that the DataSource property of a table control is not correctly bound to the Kayak elements, which are the underlying data structures used in the Web Dynpro framework.
  Cause:
  
  Incorrect Binding: The DataSource property of the table control is not properly set to the correct data source or is bound to an incompatible data structure.
  Kayak Elements Misconfiguration: The Kayak elements (which represent the data model) may not be correctly defined or may not match the expected structure for the table control.
  Data Context Issues: The context node that the table control is supposed to display may not be correctly populated or may not exist at the time of binding.
  Model-View Separation Issues: There may be a violation of the model-view separation principle, where the UI elements are not correctly linked to the data model.
  
  Solution:
  
  Check Data Binding: Ensure that the DataSource property of the table control is correctly bound to the appropriate context node. This can be done in the Web Dynpro component's view layout.
  Verify Kayak Elements: Make sure that the Kayak elements are correctly defined in the context and that they match the structure expected by the table control.
  Context Node Population: Ensure that the context node that the table control is bound to is populated with data before the view is rendered. You may need to check the controller logic to ensure that data is being fetched and assigned correctly.
  Debugging: Use debugging tools to trace the data flow and see where the binding might be failing. Check for any runtime errors or exceptions that might indicate issues with data retrieval or binding.
  Review Model-View Configuration: Ensure that the model-view configuration adheres to best practices, and that the UI elements are properly linked to the data model.
  
  Related Information:
  
  Web Dynpro Documentation: Refer to the official SAP documentation for Web Dynpro to understand the binding concepts and best practices.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and to find potential solutions or workarounds.
  SAP Notes: Check for any relevant SAP Notes that might address known issues related to this error message.
  
  By following these steps, you should be able to identify and resolve the cause of the CX_WDK_CONTROLLER302 error in your SAP Web Dynpro application.