How To Fix CL351 - Class hierarchy "&" is recursive

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 351

• Message text: Class hierarchy "&" is recursive

What causes this issue?

Class hierarchy is recursive at class &V1&.

System Response

The hierarchy explosion was terminated.

How to fix this error?

Inform your system administrator or the person responsible for
classification.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL351 - Class hierarchy "&" is recursive ?

  The SAP error message CL351 indicates that there is a recursive class hierarchy in the class definition. This means that a class is defined in such a way that it indirectly or directly references itself, which creates a loop in the class hierarchy. This is not allowed in object-oriented programming, as it can lead to infinite loops and other logical errors.
  Cause:
  
  Direct Recursion: A class is defined as a subclass of itself.
  Indirect Recursion: A class is defined as a subclass of another class, which in turn is a subclass of the first class, creating a circular reference.
  Incorrect Class Relationships: Misconfiguration in the class hierarchy where classes are not properly defined or related.
  
  Solution:
  
  
  Review Class Definitions: Check the class definitions in the SAP system to identify where the recursive relationship is occurring. Look for any classes that are set as subclasses of themselves or that create a circular reference.
  
  
  Modify Class Hierarchy: Adjust the class hierarchy to eliminate the recursive relationship. This may involve:
  
  Changing the superclass of the class.
  Removing or altering the subclass definitions.
  Ensuring that each class has a clear and non-circular inheritance path.
  
  
  
  Use Class Builder: Utilize the Class Builder (transaction code SE24) to visualize the class hierarchy and make necessary adjustments.
  
  
  Testing: After making changes, test the class definitions to ensure that the error is resolved and that the class hierarchy functions as intended.
  
  
  Related Information:
  
  Documentation: Refer to SAP documentation on class definitions and object-oriented programming principles in ABAP.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to this error.
  Community Forums: Engage with SAP community forums or support channels for additional help and shared experiences from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the CL351 error and ensure that your class hierarchy is correctly defined without recursion.