How To Fix CL601 - Class type &: class & is not part of hierarchy

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 601

• Message text: Class type &: class & is not part of hierarchy

What causes this issue?

The class you selected, &v2& with class type &V1&, has neither superior
nor subordinate classes.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL601 - Class type &: class & is not part of hierarchy ?

  The SAP error message CL601 indicates that there is an issue with class types in the context of class hierarchies. Specifically, the message states that the class type you are trying to use is not part of the expected hierarchy. This can occur in various scenarios, such as when you are trying to create a subclass or when you are working with class definitions in the ABAP Object-Oriented programming environment.
  Cause:
  
  Incorrect Class Type: The class you are trying to reference is not defined as a subclass of the expected superclass or is not part of the defined hierarchy.
  Missing Class Definition: The class you are trying to use may not be defined in the system or may have been deleted.
  Namespace Issues: The class might be in a different namespace that is not accessible in the current context.
  Typographical Errors: There may be a typo in the class name or type you are trying to reference.
  
  Solution:
  
  Check Class Definition: Verify that the class you are trying to use is correctly defined in the system. You can do this by navigating to the Class Builder (transaction code SE24) and checking the class hierarchy.
  Review Hierarchy: Ensure that the class you are trying to use is indeed a subclass of the expected superclass. If it is not, you may need to adjust the class definition.
  Correct Namespace: If the class is in a different namespace, ensure that you have the necessary authorizations and that the namespace is correctly referenced.
  Fix Typographical Errors: Double-check the class name and ensure there are no typos or incorrect references in your code.
  Recompile Classes: If you have made changes to the class definitions, try recompiling the classes to ensure that all changes are recognized by the system.
  
  Related Information:
  
  Transaction Codes: Use SE24 (Class Builder) to view and manage class definitions and hierarchies.
  Documentation: Refer to SAP documentation on Object-Oriented programming in ABAP for more details on class hierarchies and definitions.
  Debugging: If the error persists, consider using the ABAP debugger to trace the execution and identify where the incorrect class reference is being made.
  
  By following these steps, you should be able to resolve the CL601 error and ensure that your class hierarchy is correctly defined and utilized in your SAP environment.