How To Fix NAA479 - Settlement accounting already performed for period (comparison not poss.)

NAA479 - Overview

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 479

• Message text: Settlement accounting already performed for period (comparison not poss.)

What causes this issue?

The period condition of arrangement &V3& for settlement date &V1& has
already been settled.

System Response

A business volume comparison for this date is not possible.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

NAA479 - Details

• The SAP error message NAA479 indicates that a settlement accounting process has already been performed for a specific period, which prevents any further comparison or adjustments for that period. This error typically arises in the context of Asset Accounting (FI-AA) or similar modules where settlements are processed.
  
  Cause:
  
  Settlement Already Completed: The primary cause of this error is that the settlement for the specified period has already been executed. Once a settlement is completed, the system locks that period for further changes or comparisons.
  Period Locking: The accounting period may be closed, preventing any further postings or adjustments.
  
  Configuration Issues: There may be configuration settings that restrict changes to settled periods.
  
  
  Solution:
  
  Check Settlement Status: Verify if the settlement has indeed been completed for the period in question. You can do this by checking the settlement documents or reports in the Asset Accounting module.
  Open the Period: If adjustments are necessary, you may need to open the