How To Fix DL_WFC_GIL003 - Class "&1" is not derived from class "&2".

SAP Error Message - Details

• Message type: E = Error

• Message class: DL_WFC_GIL - Message class object for DL design layer model

• Message number: 003

• Message text: Class "&1" is not derived from class "&2".

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DL_WFC_GIL003 - Class "&1" is not derived from class "&2". ?

  The SAP error message DL_WFC_GIL003 indicates that there is a class inheritance issue in your ABAP code or configuration. Specifically, it means that the class specified in the error message (denoted as "&1") is not derived from the class that it is expected to inherit from (denoted as "&2"). This can occur in various scenarios, such as when you are trying to instantiate a class or when you are using polymorphism.
  Cause:
  
  Incorrect Class Definition: The class you are trying to use does not extend the expected parent class. This could be due to a typo in the class name or an incorrect class definition.
  Changes in Class Hierarchy: If the class hierarchy has been modified (e.g., a class was deleted or renamed), it may lead to this error.
  Configuration Issues: If the class is part of a configuration or a framework, it may not be properly set up to inherit from the required class.
  Transport Issues: If the class was transported from one system to another, it may not have been transported correctly, leading to inconsistencies.
  
  Solution:
  
  Check Class Definitions: Verify the class definitions in the ABAP Workbench (transaction SE80 or SE24). Ensure that the class "&1" is correctly defined to inherit from class "&2".
  Correct Inheritance: If the class is not derived from the expected parent class, modify the class definition to ensure it inherits from the correct class.
  Review Changes: If there have been recent changes to the class hierarchy, review those changes to ensure that they are correct and that all dependencies are satisfied.
  Check Transport Requests: If the issue arose after a transport, check the transport logs to ensure that all necessary objects were transported correctly.
  Debugging: If the error occurs during runtime, use the ABAP debugger to trace the execution and identify where the class instantiation is failing.
  
  Related Information:
  
  Class Hierarchy: Understanding the class hierarchy in ABAP is crucial. You can view the inheritance structure in transaction SE24.
  Documentation: Refer to the SAP documentation for class definitions and inheritance rules in ABAP.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional context.
  Community Forums: Consider searching or posting on SAP community forums for insights from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.