How To Fix OO600 - Private and protected components will automatically be made public

OO600 - Overview

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 600

• Message text: Private and protected components will automatically be made public

What causes this issue?

The interface contains components that are declared as protected or
private. However, interface components must always be public in ABAP
Objects.
When you confirm this message, any private or protected interface
components will be converted to public.
The system will create a transport entry with the form R3TR INTF
<interface>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO600 - Private and protected components will automatically be made public ?

  The SAP error message OO600, which states "Private and protected components will automatically be made public," typically occurs in the context of ABAP Object-Oriented programming. This message is a warning rather than a critical error, and it indicates that there is a potential issue with the visibility of class components (attributes or methods) in your ABAP class.
  
  Cause:
  The cause of this message is usually related to the way you are trying to access private or protected components of a class. In ABAP, class components can have different visibility levels:
  
  Public: Accessible from anywhere.
  Protected: Accessible only within the class itself and its subclasses.
  Private: Accessible only within the class itself.
  
  When you attempt to access a private or protected component from outside the class or in a way that violates the encapsulation rules, the ABAP runtime may automatically change the visibility of these components to public to allow the access. This can lead to unintended