How To Fix /PM0/AB_AT126 - A check method already exists for class &1 method &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/AB_AT -

• Message number: 126

• Message text: A check method already exists for class &1 method &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/AB_AT126 - A check method already exists for class &1 method &2 ?

  The SAP error message /PM0/AB_AT126 A check method already exists for class &1 method &2 typically indicates that there is an attempt to create or define a check method in a class where a method with the same name already exists. This is a common issue when working with ABAP classes and methods, particularly in the context of implementing checks or validations.
  Cause:
  
  Duplicate Method Definition: The error arises when you try to define a check method that has the same name as an existing method in the specified class.
  Inheritance Issues: If the class is inheriting from a parent class that already has a method with the same name, this can also lead to this error.
  Namespace Conflicts: If you are working in a system with multiple developers, it’s possible that another developer has already created a method with the same name in the same class.
  
  Solution:
  
  Check Existing Methods: Review the class definition to see if a method with the same name already exists. You can do this by navigating to the class in the ABAP Workbench (SE80 or SE24) and checking the method list.
  Rename the Method: If you find that a method with the same name exists, consider renaming your new method to something unique.
  Modify Inheritance: If the method is inherited from a parent class, you may need to override it instead of creating a new one, or you may need to change the method name.
  Check for Typos: Ensure that there are no typographical errors in the method name that might lead to confusion.
  Consult Documentation: If you are working with standard SAP classes, consult the SAP documentation to understand the existing methods and their purposes.
  
  Related Information:
  
  ABAP Class and Method Documentation: Familiarize yourself with the ABAP Object-Oriented Programming concepts, especially regarding class and method definitions.
  SAP Notes: Check SAP Notes for any known issues or updates related to the specific class or method you are working with.
  Development Guidelines: Follow best practices for naming conventions and method definitions to avoid conflicts in the future.
  
  If you continue to face issues after trying the above solutions, consider reaching out to your SAP development team or consulting with SAP support for further assistance.