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