How To Fix OO057 - A class cannot inherit from itself

OO057 - Overview

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 057

• Message text: A class cannot inherit from itself

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO057 - A class cannot inherit from itself ?

  The SAP error message OO057, which states "A class cannot inherit from itself," typically occurs in the context of ABAP Object-Oriented programming when there is an attempt to define a class that inherits from itself, either directly or indirectly. This is not allowed in object-oriented programming as it creates a circular reference that cannot be resolved.
  
  Cause:
  
  Direct Self-Inheritance: The class is defined to inherit from itself.
  Indirect Self-Inheritance: There is a chain of inheritance where a class inherits from another class, which in turn inherits from the original class, creating a loop.
  Typographical Error: A typo in the class name or incorrect reference in the inheritance declaration.
  
  
  Solution:
  
  
  Check Class Definition: Review the class definition to ensure that it does not directly inherit from itself. For example, if you have:
  CLASS my_class DEFINITION INHERITING FROM my_class.
  This should be corrected.
  
  
  Review Inheritance Chain: If the class inherits from another class, check that the parent class does not eventually