How To Fix OO286 - Parameter &1 &2 &3: Only IMPORTING allowed ( constructor method )

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 286

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

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO286 - Parameter &1 &2 &3: Only IMPORTING allowed ( constructor method ) ?

  The SAP error message OO286 indicates that there is an issue with the way parameters are being passed to a constructor method in an ABAP class. Specifically, the error states that only importing parameters are allowed in the constructor method.
  Cause:
  In ABAP Object-Oriented Programming, a constructor method is used to initialize an object when it is created. The parameters of a constructor method can only be defined as importing parameters. If you attempt to define parameters as exporting or changing, you will encounter this error.
  Solution:
  To resolve this error, you need to ensure that all parameters defined in the constructor method are marked as importing. Here’s how you can do that:
  
  
  Check the Constructor Method Definition: Open the class definition and locate the constructor method. Ensure that all parameters are defined with the IMPORTING keyword.
  Example of a correct constructor method definition:
  CLASS my_class DEFINITION.
    PUBLIC SECTION.
      METHODS: constructor IMPORTING iv_param1 TYPE string
                                iv_param2 TYPE i.
  ENDCLASS.
  
  CLASS my_class IMPLEMENTATION.
    METHOD constructor.
      " Initialization logic here
    ENDMETHOD.
  ENDCLASS.
  
  
  Remove Exporting and Changing Parameters: If you have parameters defined as EXPORTING or CHANGING, you need to remove those definitions and replace them with IMPORTING.
  
  
  Recompile the Class: After making the necessary changes, save and activate the class. This should resolve the error.
  
  
  Related Information:
  
  Constructor Method: In ABAP, the constructor method is a special method that is automatically called when an instance of a class is created. It is used to initialize the object.
  Parameter Types: In ABAP, method parameters can be defined as IMPORTING, EXPORTING, or CHANGING. For constructor methods, only IMPORTING is valid.
  ABAP Documentation: For more detailed information on ABAP classes and methods, refer to the official SAP documentation or the ABAP programming guidelines.
  
  By following these steps, you should be able to resolve the OO286 error and successfully define your constructor method.