How To Fix CL606 - Class type &: class & has no superior class

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 606

• Message text: Class type &: class & has no superior class

What causes this issue?

You have requested a class hierarchy. However, class &V2& of class type
&V1& has no superior classes.
The hierarchy cannot therefore be exploded.

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 CL606 - Class type &: class & has no superior class ?

  The SAP error message CL606 indicates that there is an issue with the class hierarchy in the ABAP Object-Oriented programming environment. Specifically, the error message states that the class you are trying to define or use does not have a valid superior class, which is necessary for the class to inherit properties and methods.
  Cause:
  
  Missing Superior Class: The class you are trying to create or reference is defined with a superior class that does not exist or is not accessible in the current context.
  Incorrect Class Type: The class type specified might be incorrect. For example, you might be trying to define a subclass of a class that is not a valid superclass.
  Typographical Errors: There could be a typo in the name of the superior class, leading to the system not being able to find it.
  Visibility Issues: The superior class might be defined in a different package or namespace that is not accessible due to authorization or visibility settings.
  
  Solution:
  
  Check Class Definition: Verify that the superior class is correctly defined and exists in the system. You can do this by navigating to the class in the Class Builder (transaction SE24).
  Correct Class Name: Ensure that the name of the superior class is spelled correctly in your class definition.
  Check Class Type: Make sure that the class you are trying to inherit from is indeed a class and not an interface or another type of object.
  Access Rights: Ensure that you have the necessary authorizations to access the superior class, especially if it is in a different package.
  Recompile Classes: If you have recently made changes to the class hierarchy, try recompiling the classes involved to ensure that all references are updated.
  Check for Transport Issues: If you are working in a transport environment, ensure that the transport containing the superior class has been imported into the system.
  
  Related Information:
  
  Transaction SE24: Use this transaction to view and manage class definitions in SAP.
  Class Hierarchy: Understanding the class hierarchy and inheritance in ABAP Objects is crucial for effective programming.
  Documentation: Refer to the SAP Help Portal or ABAP documentation for more details on class definitions and inheritance rules.
  Debugging: If the issue persists, consider using the ABAP debugger to trace the execution and identify where the class hierarchy is failing.
  
  By following these steps, you should be able to resolve the CL606 error and successfully define or use the class in your ABAP program.