How To Fix OO288 - Parameter &1 &2 &3: Only EXPORTING allowed ( Event parameter )

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 288

• Message text: Parameter &1 &2 &3: Only EXPORTING allowed ( Event parameter )

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO288 - Parameter &1 &2 &3: Only EXPORTING allowed ( Event parameter ) ?

  The SAP error message OO288, which states "Parameter &1 &2 &3: Only EXPORTING allowed (Event parameter)," typically occurs in the context of ABAP programming, particularly when dealing with event parameters in methods or function modules.
  Cause:
  This error arises when you attempt to pass parameters to an event in a way that is not allowed. In ABAP, event parameters can only be passed using the EXPORTING keyword. If you try to use CHANGING or IMPORTING for event parameters, you will encounter this error.
  Solution:
  To resolve this error, you should ensure that all parameters defined in the event are passed using the EXPORTING keyword. Here are the steps to fix the issue:
  
  
  Check Event Definition: Review the event definition in your class or program. Ensure that all parameters are defined correctly and are intended to be used as EXPORTING.
  
  
  Modify Event Triggering: When you trigger the event, make sure to use the EXPORTING keyword. For example:
  DATA: lv_param1 TYPE string,
        lv_param2 TYPE string.
  
  lv_param1 = 'Value1'.
  lv_param2 = 'Value2'.
  
  " Trigger the event with EXPORTING
  RAISE EVENT my_event EXPORTING param1 = lv_param1
                                param2 = lv_param2.
  
  
  Review Event Handling: If you have event handlers (methods that handle the event), ensure that they are defined to accept the parameters as EXPORTING.
  
  
  Related Information:
  
  
  Event Handling in ABAP: Events in ABAP are used to implement the observer design pattern, where an object can notify other objects about changes or actions. Understanding how to properly define and handle events is crucial for effective ABAP programming.
  
  
  ABAP Documentation: Refer to the official SAP documentation for more details on event handling and parameter passing in ABAP. This can provide additional context and examples.
  
  
  Debugging: If you continue to face issues, consider using the ABAP debugger to step through the code and identify where the incorrect parameter passing is occurring.
  
  
  By following these steps, you should be able to resolve the OO288 error and ensure that your event parameters are handled correctly.