How To Fix 0K658 - Avoid callback AFTER_LINE_OUTPUT

SAP Error Message - Details

• Message type: E = Error

• Message class: 0K - Messages for "General List Modules"

• Message number: 658

• Message text: Avoid callback AFTER_LINE_OUTPUT

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 0K658 - Avoid callback AFTER_LINE_OUTPUT ?

  The SAP error message 0K658 - Avoid callback AFTER_LINE_OUTPUT typically occurs in the context of ABAP programming, particularly when dealing with ALV (ABAP List Viewer) reports or when using certain output methods that involve callbacks.
  Cause:
  This error is generally caused by the following scenarios:
  
  
  Improper Use of Callbacks: The error indicates that a callback method is being invoked after the line output has already been processed. In ALV, callbacks are used to handle events like double-clicks or context menu actions, and if they are not managed correctly, this error can occur.
  
  
  Incorrect Sequence of Events: If the program logic attempts to call a method or perform an action that is not allowed after the output has been generated, it can lead to this error.
  
  
  ALV Grid Control: If you are using the ALV Grid Control and have defined a callback for a certain event, ensure that the callback is not being triggered after the output has been finalized.
  
  
  Solution:
  To resolve the error, consider the following steps:
  
  
  Review Callback Logic: Check the implementation of your callback methods. Ensure that they are not being called after the output has been generated. You may need to adjust the sequence of your code to ensure that callbacks are only invoked at appropriate times.
  
  
  Use Proper Event Handling: Make sure that you are using the correct event handling methods for your ALV grid or list. For example, if you are using CL_GUI_ALV_GRID, ensure that you are handling events like DATA_CHANGED or DOUBLE_CLICK correctly.
  
  
  Debugging: Use the ABAP debugger to step through your code and identify where the callback is being triggered. This can help you pinpoint the exact location and reason for the error.
  
  
  Check Documentation: Refer to the SAP documentation for ALV and callback methods to ensure that you are following best practices and guidelines.
  
  
  Update SAP Notes: Sometimes, specific issues may be addressed in SAP Notes. Check for any relevant notes that might provide additional insights or patches related to this error.
  
  
  Related Information:
  
  ALV Documentation: Familiarize yourself with the ALV documentation provided by SAP, which includes guidelines on using callbacks and event handling.
  SAP Community: Engage with the SAP Community forums where other developers may have encountered similar issues and can provide insights or solutions.
  SAP Notes: Regularly check SAP Notes for updates or fixes related to ALV and callback handling.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to avoid the 0K658 error in your SAP ABAP programs.