How To Fix CLB2162 - Implementation class &1 must implement/be derived from &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB2 - SAIL: Common messages

• Message number: 162

• Message text: Implementation class &1 must implement/be derived from &2

What causes this issue?

A class with the name &V1& has been read from Customizing, but for this
entry it is expected that the class inherits from the base
class/interface &V2&.
This is not the case for &V1&.

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?

Check if the Customizing settings are correct, that is, if the class
which caused the error has been entered at the right place.
If this is the case, check whether the class inherits from or implements
&V2&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB2162 - Implementation class &1 must implement/be derived from &2 ?

  The SAP error message CLB2162 indicates that there is an issue with the implementation of a class in the ABAP programming environment. Specifically, it means that the implementation class (denoted as &1) does not correctly implement or derive from the specified base class or interface (denoted as &2). This error typically arises in the context of class definitions and inheritance in ABAP Object-Oriented Programming.
  Cause:
  
  Incorrect Class Definition: The implementation class is not correctly defined to inherit from the specified base class or interface.
  Missing Implementation: The class may not have implemented all the required methods or attributes defined in the base class or interface.
  Typographical Errors: There may be typographical errors in the class names or in the inheritance declaration.
  Changes in Base Class: If the base class or interface has been modified (e.g., methods added or changed), the implementation class may need to be updated accordingly.
  
  Solution:
  
  
  Check Class Definition: Verify that the implementation class is correctly defined to inherit from the specified base class or interface. This can be done in the class definition section of the ABAP editor.
  
  Ensure that the INHERIT FROM clause is correctly specified.
  
  
  
  Implement Required Methods: If the base class or interface has abstract methods or required methods, ensure that these methods are implemented in the implementation class.
  
  Use the ABAP Class Builder (transaction SE24) to check for any unimplemented methods.
  
  
  
  Correct Typographical Errors: Double-check the names of the classes and interfaces for any typographical errors.
  
  
  Update Implementation Class: If the base class or interface has changed, update the implementation class to ensure it complies with the new definition.
  
  
  Activate Changes: After making the necessary changes, activate the implementation class and any related classes to ensure that the changes take effect.
  
  
  Related Information:
  
  ABAP Class Builder (SE24): Use this transaction to view and edit class definitions and implementations.
  Documentation: Refer to the SAP documentation for Object-Oriented Programming in ABAP for more details on class inheritance and implementation requirements.
  Debugging: If the error persists, consider using the ABAP debugger to trace the execution and identify where the issue arises.
  
  By following these steps, you should be able to resolve the CLB2162 error and ensure that your implementation class is correctly defined and functional.