How To Fix SALV_X_API126 - Method call not allowed after first display

SAP Error Message - Details

• Message type: E = Error

• Message class: SALV_X_API - Messages for ALV API exceptions

• Message number: 126

• Message text: Method call not allowed after first display

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SALV_X_API126 - Method call not allowed after first display ?

  The SAP error message SALV_X_API126: Method call not allowed after first display typically occurs when you are trying to call a method on an ALV (ABAP List Viewer) object after it has already been displayed. In the context of SAP ABAP programming, once the ALV grid has been rendered on the screen, certain methods cannot be called anymore because the display process has already been finalized.
  Cause:
  The error is caused by attempting to modify or interact with the ALV object after the display method has been executed. This includes trying to set properties, add data, or call methods that are not allowed post-display.
  Solution:
  To resolve this error, you should ensure that all necessary configurations and method calls are made before the display method is called. Here are some steps to follow:
  
  
  Check Method Calls: Review your code to ensure that all method calls related to the ALV object are made before the display method is invoked.
  
  
  Reorganize Code: If you need to make changes to the ALV after it has been displayed, you will need to either:
  
  Refresh the ALV display by calling the appropriate refresh method (e.g., refresh_table_display).
  Recreate the ALV object if significant changes are needed.
  
  
  
  Use Event Handlers: If you need to handle user interactions after the display, consider using event handlers (like on_user_command) to manage user actions without trying to modify the ALV object directly.
  
  
  Debugging: If you are unsure where the error is occurring, use debugging tools to step through your code and identify the exact point where the method call is made after the display.
  
  
  Related Information:
  
  ALV Object Lifecycle: Understand the lifecycle of ALV objects in ABAP. The typical flow involves creating the ALV object, setting properties, populating data, and then calling the display method.
  Documentation: Refer to the SAP documentation for the specific ALV class you are using (e.g., CL_GUI_ALV_GRID, CL_SALV_TABLE) for details on the methods available and their usage.
  SAP Notes: Check SAP Notes for any known issues or updates related to the ALV framework that might provide additional context or solutions.
  
  By following these guidelines, you should be able to resolve the SALV_X_API126 error and ensure that your ALV display logic works as intended.