How To Fix GENIL_WCF170 - Relation &3: Substituted handler class &1 has to be derived from &2

SAP Error Message - Details

• Message type: E = Error

• Message class: GENIL_WCF - Messages for genIL Model Editor

• Message number: 170

• Message text: Relation &3: Substituted handler class &1 has to be derived from &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message GENIL_WCF170 - Relation &3: Substituted handler class &1 has to be derived from &2 ?

  The SAP error message GENIL_WCF170 indicates that there is an issue with the handler class in the context of the SAP Generic Interaction Layer (GENIL) and the Web Client Framework (WCF). Specifically, the error message states that a substituted handler class must be derived from a specific base class.
  Cause:
  This error typically occurs when:
  
  A custom handler class is defined that does not properly extend or inherit from the required base class.
  There may be a mismatch in the class hierarchy, meaning that the custom class does not follow the expected inheritance structure.
  The configuration of the handler in the application may be incorrect, leading to the system not recognizing the class as a valid substitute.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Class Inheritance:
  
  Verify that the custom handler class (&1) is correctly derived from the required base class (&2). You can do this by checking the class definition in the ABAP Workbench (SE80 or SE24).
  If the class is not derived from the correct base class, modify the class definition to ensure it inherits from the appropriate class.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the relevant transaction (e.g., customizing settings for the application) to ensure that the handler class is correctly specified.
  Ensure that the class name is correctly spelled and that there are no typographical errors.
  
  
  
  Re-implement the Handler:
  
  If necessary, you may need to re-implement the handler class to ensure it adheres to the expected structure and functionality.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest support packages and notes, as there may be fixes or enhancements related to this issue.
  
  
  
  Testing:
  
  After making the necessary changes, test the application to ensure that the error no longer occurs and that the functionality works as expected.
  
  
  
  Related Information:
  
  GENIL: The Generic Interaction Layer is a framework in SAP that allows for the development of business applications with a focus on reusability and flexibility.
  WCF: The Web Client Framework is used to create web-based applications in SAP, providing a user interface for various business processes.
  ABAP Workbench: This is the development environment in SAP where you can create and manage ABAP programs, classes, and other objects.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting the SAP community for further assistance.