How To Fix OO655 - Released class -> visibility changed to 'private'

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 655

• Message text: Released class -> visibility changed to 'private'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO655 - Released class -> visibility changed to 'private' ?

  The SAP error message OO655 indicates that the visibility of a released class has been changed to 'private'. This typically occurs in the context of ABAP Object-Oriented programming when a class that has been released (i.e., made available for use) has its visibility settings altered, which can lead to issues in the code that depends on that class.
  Cause:
  
  Visibility Change: The class was previously public or protected, allowing other classes or programs to access it. Changing it to private restricts access to the class itself, which can break existing dependencies.
  Development Changes: A developer may have modified the class definition, either intentionally or unintentionally, leading to this visibility change.
  Transport Requests: If the class was transported from one system to another, the visibility settings may not have been correctly maintained.
  
  Solution:
  
  Revert Visibility Change: If the change was unintentional, revert the visibility of the class back to its original state (public or protected) to restore access.
  Check Dependencies: Review the code that depends on the class to ensure that it is still valid. If the class must remain private, consider refactoring the dependent code to accommodate this change.
  Documentation and Communication: Ensure that any changes to class visibility are documented and communicated to the development team to prevent confusion and errors in the future.
  Use of Interfaces: If the class needs to remain private but still needs to be accessed by other classes, consider using interfaces or other design patterns to maintain the necessary access without exposing the class directly.
  
  Related Information:
  
  Class Visibility in ABAP: In ABAP, classes can have different visibility levels: public, protected, and private. Public classes can be accessed from anywhere, protected classes can be accessed within the class and its subclasses, and private classes can only be accessed within the class itself.
  Best Practices: It is generally a good practice to keep the visibility of classes as restrictive as possible to promote encapsulation and reduce dependencies. However, this must be balanced with the need for other classes to access necessary functionality.
  Transport Management: When transporting objects between systems, ensure that all dependencies and visibility settings are correctly handled to avoid issues like OO655.
  
  By addressing the visibility issue and ensuring proper communication and documentation, you can resolve the OO655 error and maintain the integrity of your ABAP applications.