How To Fix OL596 - Table '&' is already implemented in a super type

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 596

• Message text: Table '&' is already implemented in a super type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OL596 - Table '&' is already implemented in a super type ?

  The SAP error message OL596 indicates that there is an issue with the implementation of a table in the context of Object-Oriented Programming (OOP) in ABAP. Specifically, it means that the table you are trying to implement is already defined in a super type (a parent class) of the class you are working with. This can lead to conflicts or redundancy in the class hierarchy.
  Cause:
  
  Redundant Definition: You are trying to define a table in a subclass that has already been defined in its superclass.
  Inheritance Issues: The subclass is inheriting from a superclass that already contains the table definition, leading to a conflict.
  Incorrect Class Design: The class design may not be following the principles of inheritance properly, leading to attempts to redefine existing attributes.
  
  Solution:
  
  Remove Redundant Definition: Check the superclass for the table definition and remove the redundant definition from the subclass. You should only define the table in one place (preferably in the superclass).
  Use Inheritance Properly: Ensure that you are using inheritance correctly. If the table is meant to be part of the superclass, it should not be redefined in the subclass.
  Refactor Class Design: If necessary, refactor your class design to ensure that attributes and methods are defined in the appropriate classes, following the principles of OOP.
  Check Class Hierarchy: Review the class hierarchy to understand where the table is defined and how it is being inherited. This can help clarify the structure and avoid conflicts.
  
  Related Information:
  
  ABAP Object-Oriented Programming: Understanding the principles of OOP in ABAP, including inheritance, encapsulation, and polymorphism, can help prevent such issues.
  SAP Documentation: Refer to the official SAP documentation for guidelines on class design and inheritance in ABAP.
  Debugging Tools: Use the ABAP debugger to trace the class hierarchy and see where the table is defined and how it is being used.
  
  By addressing the redundancy and ensuring proper class design, you should be able to resolve the OL596 error and proceed with your development.