How To Fix WD028 - Secondary methods are not executed in preview execution

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 028

• Message text: Secondary methods are not executed in preview execution

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WD028 - Secondary methods are not executed in preview execution ?

  The SAP error message WD028, which states "Secondary methods are not executed in preview execution," typically occurs in the context of Web Dynpro applications. This message indicates that when you are in preview mode (for example, when testing or previewing a Web Dynpro component), the secondary methods that are defined in the application are not executed. 
  Cause:
  
  Preview Mode Limitation: In Web Dynpro, the preview mode is designed primarily for testing the layout and basic functionality of the application. It does not execute all the backend logic, including secondary methods, which are often used for data processing or business logic.
  Method Configuration: The secondary methods may not be configured to run in preview mode. This is a design choice to optimize performance and avoid unnecessary processing during the preview.
  Event Handling: If the secondary methods are tied to specific events that are not triggered in preview mode, they will not execute.
  
  Solution:
  
  Test in Full Mode: To see the full functionality of your Web Dynpro application, you should run it in the full execution mode rather than preview mode. This will ensure that all methods, including secondary ones, are executed.
  Check Method Configuration: Review the configuration of your secondary methods to ensure they are set up correctly and are intended to be executed in the context you are testing.
  Debugging: If you need to debug the secondary methods, consider using the debugger in the full execution mode to step through the code and see how the methods are being called.
  Documentation Review: Consult the SAP documentation for Web Dynpro to understand the limitations of preview mode and how to properly test your application.
  
  Related Information:
  
  Web Dynpro Documentation: SAP provides extensive documentation on Web Dynpro, which includes information on methods, events, and execution modes.
  SAP Community: Engaging with the SAP Community can provide insights from other developers who may have encountered similar issues.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or provide updates related to Web Dynpro and error messages.
  
  By following these steps, you should be able to address the WD028 error and understand the limitations of preview execution in SAP Web Dynpro applications.