How To Fix CLB162 - Implementation class &1 must implement/be derived from &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB - 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 &syst-msgv1& has been read from the customizing;
but for this entry it is expected that the class inherits from the base
class/interface &syst-msgv2&.
This is not the case for &syst-msgv1&.

System Response

The method in progress will be cancelled.

How to fix this error?

Check if the customizing is correct, that is if the class which caused
the error has been entered at the right place.
If yes check whether the class inherits from/implements &syst-msgv2&.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB162 - Implementation class &1 must implement/be derived from &2 ?

  The SAP error message CLB162 indicates that there is an issue with the implementation of a class in the ABAP programming environment. Specifically, it means that the implementation class you are trying to use does not correctly implement or derive from the specified base class or interface.
  Cause:
  
  Incorrect Class Declaration: The class you are trying to implement does not properly declare that it implements or inherits from the required base class or interface.
  Missing Implementation: The class may be missing the necessary methods or attributes that are defined in the base class or interface.
  Typographical Errors: There may be typographical errors in the class name or the base class/interface name.
  Inconsistent Class Hierarchy: The class hierarchy may not be set up correctly, leading to inconsistencies in the implementation.
  
  Solution:
  
  
  Check Class Declaration: Ensure that the class declaration includes the correct base class or interface. For example:
  CLASS your_class_name DEFINITION
    INHERITING FROM base_class_name
    ...
  ENDCLASS.
  or
  CLASS your_class_name DEFINITION
    IMPLEMENTING interface_name
    ...
  ENDCLASS.
  
  
  Implement Required Methods: If the base class or interface defines certain methods, make sure that your implementation class provides these methods. You can do this by implementing the methods in the class:
  METHOD your_method_name.
    " Your implementation here
  ENDMETHOD.
  
  
  Check for Typos: Verify that there are no typographical errors in the class names or method names. Ensure that the names match exactly with those defined in the base class or interface.
  
  
  Review Class Hierarchy: If you are working with a complex class hierarchy, review the entire hierarchy to ensure that all classes are correctly defined and that there are no missing links.
  
  
  Activate All Related Objects: After making changes, ensure that you activate all related classes, interfaces, and methods to reflect the changes in the system.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on class and interface implementation.
  SAP Community: You can search for similar issues on the SAP Community forums, where other developers may have encountered and resolved similar problems.
  Debugging Tools: Use the ABAP debugger to step through the code and identify where the implementation is failing.
  
  By following these steps, you should be able to resolve the CLB162 error and ensure that your implementation class is correctly set up.