How To Fix KF109 - Posting period & is not a special period

SAP Error Message - Details

• Message type: E = Error

• Message class: KF -

• Message number: 109

• Message text: Posting period & is not a special period

What causes this issue?

The fiscal year for this company code does not contain the special
period you entered. You define the fiscal year variant in Table T009.

System Response

The system expects you to enter a valid posting period.

How to fix this error?

Enter a valid posting period. If you leave the field empty, the posting
period will be derived from the posting date.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KF109 - Posting period & is not a special period ?

  The SAP error message KF109, which states "Posting period & is not a special period," typically occurs when you are trying to post a transaction in a period that is not designated as a special period in the system. This error is common in financial postings, particularly in the context of controlling (CO) or financial accounting (FI).
  Cause:
  
  Incorrect Posting Period: The posting period you are trying to use is not set up as a special period in the system.
  Period Status: The period may be closed for posting, or it may not be configured to allow postings for the type of transaction you are attempting.
  Configuration Issues: The configuration settings in the controlling area or company code may not allow postings to that specific period.
  
  Solution:
  
  Check Posting Period: Verify the posting period you are trying to use. Ensure that it is indeed a special period and that it is open for posting.
  Transaction Type: Ensure that the transaction type you are trying to post is allowed in the specified period.
  Period Control Settings: Go to the transaction code OB52 (for financial accounting) or OKP1 (for controlling) to check the period control settings. Make sure that the period you are trying to post to is open for the relevant company code and fiscal year.
  Change Posting Period: If the period is not a special period, consider changing the posting to a valid period that is open for posting.
  Consult with Finance Team: If you are unsure about the configuration or the posting periods, consult with your finance or SAP configuration team to ensure that the settings are correct.
  
  Related Information:
  
  Special Periods: In SAP, special periods are typically used for adjustments, year-end closing, or other specific financial activities. They are defined in the configuration settings and can be set up to allow postings in specific scenarios.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  OB52: To manage posting periods for financial accounting.
  OKP1: To manage periods for controlling.
  
  
  SAP Documentation: Refer to SAP Help documentation for detailed information on posting periods and special periods, as well as best practices for managing financial postings.
  
  By following these steps, you should be able to resolve the KF109 error and successfully post your transaction.