How To Fix FKKINFCO018 - Class &1 does not implement interface &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKINFCO - Information Container

• Message number: 018

• Message text: Class &1 does not implement interface &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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKKINFCO018 - Class &1 does not implement interface &2 ?

  The SAP error message FKKINFCO018 indicates that a specific class does not implement a required interface. This error typically arises in the context of SAP's Contract Accounts Receivable and Payable (FI-CA) module, particularly when dealing with custom developments or enhancements.
  Cause:
  The error occurs when the system attempts to call a method on a class that is expected to implement a certain interface, but the class does not actually implement that interface. This can happen due to:
  
  Custom Development: If a custom class was created or modified and it was expected to implement a specific interface but was not correctly defined.
  Missing Implementation: The class might have been created without implementing all the required methods of the interface.
  Configuration Issues: There may be configuration settings that are pointing to the wrong class or interface.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Class Implementation:
  
  Go to the ABAP Workbench (transaction SE80 or SE24).
  Locate the class mentioned in the error message (replace &1 with the actual class name).
  Verify that the class implements the interface mentioned in the error message (replace &2 with the actual interface name).
  If the class does not implement the interface, you will need to modify the class to implement it correctly.
  
  
  
  Implement Missing Methods:
  
  If the class is supposed to implement the interface but is missing methods, add the required methods to the class.
  
  
  
  Review Custom Code:
  
  If this is a custom development, review the code to ensure that it adheres to the expected structure and interfaces.
  
  
  
  Check Configuration:
  
  Ensure that any configuration settings that reference the class or interface are correct and point to the right objects.
  
  
  
  Transport Issues:
  
  If this issue arose after a transport, ensure that all necessary objects were transported correctly and that there are no missing dependencies.
  
  
  
  Consult Documentation:
  
  If you are unsure about the expected implementation, refer to SAP documentation or the interface definition to understand what methods need to be implemented.
  
  
  
  Related Information:
  
  Transaction Codes: Use SE80 (Object Navigator) or SE24 (Class Builder) to investigate the class and interface.
  Debugging: If necessary, you can use the debugger to trace where the error occurs and gather more context about the call stack.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional guidance.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.