How To Fix OO195 - A public attribute type cannot be local to a class

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 195

• Message text: A public attribute type cannot be local to a class

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO195 - A public attribute type cannot be local to a class ?

  The SAP error message OO195, which states "A public attribute type cannot be local to a class," typically occurs in ABAP Object-Oriented programming when you attempt to declare a public attribute (or property) of a class with a type that is defined locally within that class. In ABAP, public attributes must be of a type that is globally accessible.
  Cause:
  The error arises when you define a public attribute in a class with a type that is not visible outside the class. This usually happens when:
  
  You define a type (like a structure or a table type) within the class itself, and then you try to use that type for a public attribute.
  The type is local to the class and cannot be accessed from outside the class, which violates the rules of visibility for public attributes.
  
  Solution:
  To resolve this error, you need to ensure that the type of the public attribute is globally accessible. Here are a few approaches to fix the issue:
  
  
  Use Global Types: Define the type in a global context, such as in a global type pool or in the global data dictionary (SE11). Then, use this global type for your public attribute.
  TYPES: BEGIN OF ty_example,
           field1 TYPE string,
           field2 TYPE i,
         END OF ty_example.
  
  CLASS my_class DEFINITION.
    PUBLIC SECTION.
      DATA: my_attribute TYPE ty_example.  " Use a global type instead
    PRIVATE SECTION.
      " Other private members
  ENDCLASS.
  
  
  Use Local Types for Private Attributes: If the type is only needed within the class and does not need to be public, you can declare the attribute as private or protected instead of public.
  CLASS my_class DEFINITION.
    PRIVATE SECTION.
      TYPES: BEGIN OF ty_example,
               field1 TYPE string,
               field2 TYPE i,
             END OF ty_example.
      DATA: my_private_attribute TYPE ty_example.
  ENDCLASS.
  
  
  Use Interfaces: If you need to expose certain functionalities or types, consider using interfaces to define the types that can be shared across different classes.
  
  
  Related Information:
  
  Visibility Modifiers: Understand the different visibility modifiers in ABAP (PUBLIC, PROTECTED, PRIVATE) and how they affect the accessibility of class members.
  Type Definitions: Familiarize yourself with how to define types in ABAP, including global types and local types, and the implications of their scope.
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP, including best practices for defining classes and attributes.
  
  By following these guidelines, you should be able to resolve the OO195 error and ensure that your ABAP classes are correctly structured.