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

FKK_ID_XX_ODN121 - Overview

• 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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FKK_ID_XX_ODN121 - Details

• 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