How To Fix FKK_ID_XX_ODN121 - Method must be implemented in sub-class

SAP Error Message - Details

• Message type: E = Error

• Message class: FKK_ID_XX_ODN - ODN message

• Message number: 121

• Message text: Method must be implemented in sub-class

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKK_ID_XX_ODN121 - Method must be implemented in sub-class ?

  The SAP error message FKK_ID_XX_ODN121 Method must be implemented in sub-class typically occurs in the context of SAP's Flexible Real Estate Management (RE-FX) or Contract Accounts Receivable and Payable (FI-CA) modules. This error indicates that a method that is expected to be implemented in a subclass of a certain class has not been implemented. 
  Cause:
  
  Incomplete Implementation: The error usually arises when a developer has created a subclass of a certain class but has not implemented all the required methods defined in the parent class.
  Custom Development: If there is custom development involved, it is possible that the developer did not complete the implementation of all abstract methods or interface methods that are required by the superclass.
  Missing Enhancements: If the system has been enhanced or modified, it may lead to situations where certain methods are expected to be present but are missing.
  
  Solution:
  
  
  Implement the Method: Identify the subclass that is causing the error and implement the required method. You can do this by:
  
  Navigating to the class in the ABAP Workbench (SE80 or SE24).
  Checking the methods defined in the parent class and implementing the missing method in the subclass.
  
  
  
  Check for Documentation: Review the documentation for the class and its methods to understand what the method is supposed to do. This will help you implement it correctly.
  
  
  Debugging: If you are unsure which method is missing, you can use the debugger to trace the execution and identify where the error is being raised.
  
  
  Consult with Developers: If you are not the developer who created the subclass, consult with the original developer or your technical team to understand the intended functionality and how to implement the missing method.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide guidance on implementing the required methods.
  
  
  Related Information:
  
  ABAP Classes and Interfaces: Familiarize yourself with the concepts of ABAP classes and interfaces, especially regarding inheritance and method implementation.
  SAP Documentation: Refer to the official SAP documentation for the specific module you are working with (e.g., RE-FX, FI-CA) for more context on the classes and methods involved.
  Community Forums: Consider checking SAP Community forums or other developer forums for similar issues and solutions shared by other developers.
  
  By following these steps, you should be able to resolve the error and ensure that the necessary methods are implemented in your subclass.