How To Fix FKKEXC165 - Payment &1 is unknown to system

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKEXC - Message Class for External Payments

• Message number: 165

• Message text: Payment &1 is unknown to system

What causes this issue?

Payment &v1& of branch &v2&, cash desk &v3& is to be reversed. However,
this payment has not yet arrived in the system (database table <LS>
DFKKEXC</>).

System Response

The message with the reversal information is returned.

How to fix this error?

First enter the payment &v1&. Check whether the payment is waiting in an
inbound queue and has not been processed yet.
Once you have entered the payment, you can process the reversal message
again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FKKEXC165 - Payment &1 is unknown to system ?

  The SAP error message FKKEXC165, which states "Payment &1 is unknown to system," typically occurs in the context of the Contract Accounts Receivable and Payable (FI-CA) module. This error indicates that the system cannot find the specified payment document or that the payment document is not recognized in the current context.
  Causes:
  
  Incorrect Payment Document Number: The payment document number provided may be incorrect or mistyped.
  Document Not Posted: The payment document may not have been posted in the system yet.
  Document Deleted or Archived: The payment document may have been deleted or archived, making it unavailable for processing.
  Authorization Issues: The user may not have the necessary authorizations to view or process the payment document.
  Data Consistency Issues: There may be inconsistencies in the database or issues with the data integrity.
  
  Solutions:
  
  Verify Payment Document Number: Check the payment document number for accuracy. Ensure that it is entered correctly.
  Check Document Status: Use transaction codes like FBL5N (Customer Line Item Display) or FBL1N (Vendor Line Item Display) to check if the payment document exists and its status.
  Repost Payment: If the payment document has not been posted, ensure that it is posted correctly in the system.
  Check Authorizations: Ensure that the user has the necessary authorizations to access the payment document.
  Consult with IT Support: If the document has been deleted or archived, consult with your IT support team to determine if it can be restored or if there are any data consistency issues that need to be addressed.
  Review System Logs: Check system logs for any additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FBL5N, FBL1N, and FKKOPV (for payment processing).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for the FI-CA module to understand the payment processing workflow and any prerequisites for payment documents.
  
  If the issue persists after trying the above solutions, it may be necessary to escalate the problem to your SAP support team or consult with SAP directly for further assistance.