How To Fix OO601 - Method & is abstract and has not been redefined

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 601

• Message text: Method & is abstract and has not been redefined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO601 - Method & is abstract and has not been redefined ?

  The SAP error message OO601 indicates that a method in an object-oriented class is declared as abstract but has not been redefined in a subclass. This typically occurs in the context of ABAP (Advanced Business Application Programming) when working with classes and inheritance.
  Cause:
  
  Abstract Method: An abstract method is defined in a class but does not have an implementation. It is meant to be overridden in subclasses.
  Subclass Implementation: If a subclass does not provide an implementation for the abstract method, the system will raise the OO601 error when you attempt to instantiate the subclass or call the method.
  
  Solution:
  To resolve the OO601 error, you need to ensure that all abstract methods in the superclass are implemented in the subclass. Here are the steps to do this:
  
  
  Identify the Abstract Method: Check the class definition of the superclass to identify the abstract method that is causing the error.
  CLASS super_class DEFINITION.
    PUBLIC SECTION.
      METHODS: abstract_method ABSTRACT.
  ENDCLASS.
  
  
  Implement the Method in the Subclass: In the subclass, provide an implementation for the abstract method.
  CLASS sub_class DEFINITION INHERITING FROM super_class.
    PUBLIC SECTION.
      METHODS: abstract_method REDEFINITION.
  ENDCLASS.
  
  CLASS sub_class IMPLEMENTATION.
    METHOD abstract_method.
      " Implementation code here
    ENDMETHOD.
  ENDCLASS.
  
  
  Check for Multiple Subclasses: If you have multiple subclasses, ensure that each subclass that inherits from the abstract class implements the abstract method.
  
  
  Recompile the Classes: After making the necessary changes, recompile the classes to ensure that the changes take effect.
  
  
  Related Information:
  
  Abstract Classes and Methods: In ABAP, abstract classes are used to define a common interface for subclasses. Abstract methods must be implemented in any concrete subclass.
  Inheritance: Understanding how inheritance works in ABAP is crucial for working with abstract classes and methods.
  Error Handling: Familiarize yourself with error handling in ABAP to manage exceptions that may arise from unimplemented methods.
  
  By following these steps, you should be able to resolve the OO601 error and ensure that your classes are correctly implemented.