How To Fix FKKINV345 - Day cannot be overwritten for billing cycle &1

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKINV - Invoicing in Contract Accounts Receivable and Payable

• Message number: 345

• Message text: Day cannot be overwritten for billing cycle &1

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message FKKINV345 - Day cannot be overwritten for billing cycle &1 ?

  The SAP error message FKKINV345, which states "Day cannot be overwritten for billing cycle &1," typically occurs in the context of billing and invoicing within the SAP Convergent Charging or Contract Accounts Receivable and Payable (FI-CA) modules. This error indicates that there is an issue with the billing cycle configuration or the specific billing document you are trying to process.
  Cause:
  
  Billing Cycle Configuration: The billing cycle may have specific settings that prevent changes to the billing day. This can happen if the billing cycle is locked or if certain parameters are set to restrict changes.
  Document Status: The billing document may already be in a status that does not allow modifications, such as being posted or finalized.
  System Settings: There may be system-wide settings or user authorizations that restrict changes to billing days for certain billing cycles.
  
  Solution:
  
  
  Check Billing Cycle Settings: Review the configuration of the billing cycle in the SAP system. Ensure that the settings allow for changes to the billing day if necessary.
  
  Navigate to the relevant configuration path in SPRO (Customizing) and check the settings for billing cycles.
  
  
  
  Document Status Review: Verify the status of the billing document. If it is already posted or finalized, you may need to reverse or adjust the document before making changes.
  
  Use transaction codes like FBL5N (Customer Line Item Display) to check the status of the document.
  
  
  
  User Authorizations: Ensure that the user has the necessary authorizations to make changes to billing cycles and documents. If not, contact your SAP security administrator to adjust the permissions.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to this error message for any specific guidance or patches that may address the issue.
  
  
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide insights based on the specific configuration and version of your SAP system.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FKKINV (for invoice processing) and SPRO (for configuration).
  SAP Notes: Search for SAP Notes related to FKKINV345 for any known issues or fixes.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.