How To Fix OO287 - Parameter &1 &2 &3: Only IMPORTING allowed ( Event handler method )

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 287

• Message text: Parameter &1 &2 &3: Only IMPORTING allowed ( Event handler method )

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO287 - Parameter &1 &2 &3: Only IMPORTING allowed ( Event handler method ) ?

  The SAP error message OO287, which states "Parameter &1 &2 &3: Only IMPORTING allowed (Event handler method)," typically occurs in the context of ABAP Object-Oriented programming, particularly when dealing with event handler methods in classes.
  Cause:
  This error arises when you attempt to define a parameter in an event handler method that is not allowed. In ABAP, event handler methods are expected to have parameters that are defined as IMPORTING only. If you try to define parameters as EXPORTING, CHANGING, or any other type, the system will raise this error.
  Solution:
  To resolve this error, you should ensure that all parameters in your event handler method are defined as IMPORTING. Here’s how you can do that:
  
  
  Check the Method Definition: Go to the class definition where the event handler is implemented.
  
  
  Modify Parameters: Ensure that all parameters in the event handler method are declared as IMPORTING. For example:
  METHOD my_event_handler.
    IMPORTING
      !param1 TYPE string
      !param2 TYPE i.
    " Your code here
  ENDMETHOD.
  
  
  Remove Non-Importing Parameters: If you have any parameters defined as EXPORTING or CHANGING, remove or change them to IMPORTING.
  
  
  Related Information:
  
  
  Event Handling in ABAP: In ABAP, event handling is a way to respond to specific events triggered by user actions or system processes. Event handler methods are defined in classes and are linked to events.
  
  
  Method Parameter Types: Understanding the different types of parameters in ABAP methods is crucial. The types are:
  
  IMPORTING: Used to pass data into the method.
  EXPORTING: Used to return data from the method.
  CHANGING: Used to pass data into the method and allow it to be modified.
  
  For event handlers, only IMPORTING parameters are valid.
  
  
  Documentation: Refer to the official SAP documentation for more details on event handling and method definitions in ABAP.
  
  
  By following these steps and understanding the context of the error, you should be able to resolve the OO287 error effectively.