How To Fix OO629 - The superclass of a persistent class must be persistent

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 629

• Message text: The superclass of a persistent class must be persistent

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO629 - The superclass of a persistent class must be persistent ?

  The SAP error message OO629 indicates that there is an issue with the inheritance structure of a persistent class in the ABAP Object-Oriented programming environment. Specifically, it means that the superclass of a persistent class is not itself a persistent class, which violates the rules of the ABAP Object-Oriented model.
  Cause:
  
  Non-Persistent Superclass: The superclass of the class you are trying to define as persistent is not marked as persistent. In ABAP, a persistent class is one that is intended to be stored in the database, and its superclass must also be persistent to ensure that the entire inheritance chain is valid for database storage.
  Incorrect Class Definition: The class definition may have been incorrectly set up, where the superclass is either not defined as persistent or is a local class that cannot be persistent.
  
  Solution:
  
  Check Superclass Definition: Verify the definition of the superclass. Ensure that it is declared as a persistent class. You can do this by checking the class attributes in the Class Builder (SE24).
  Modify Superclass: If the superclass is not persistent, you will need to modify it to make it persistent. This can be done by:
  
  Changing the class type to a persistent class.
  Ensuring that the superclass has the necessary database table associated with it.
  
  
  Re-Define Class Hierarchy: If it is not feasible to make the superclass persistent, consider redesigning your class hierarchy. You may need to create a new persistent superclass that can serve as the base for your persistent class.
  Check for Local Classes: Ensure that the superclass is not a local class (defined within a method or function module), as local classes cannot be persistent.
  
  Related Information:
  
  Persistent Classes: In ABAP, persistent classes are typically used to represent database tables. They are defined with the PERSISTENT keyword and must have a corresponding database table.
  Class Builder (SE24): Use the Class Builder transaction to manage class definitions, including checking and modifying class attributes.
  Documentation: Refer to the SAP Help Portal or ABAP documentation for more details on class definitions and persistent classes.
  
  By following these steps, you should be able to resolve the OO629 error and ensure that your class hierarchy is correctly set up for persistence in the SAP system.