How To Fix FKKINV308 - Invoicing function &1 is not active in invoicing process &2

FKKINV308 - Overview

• Message type: E = Error

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

• Message number: 308

• Message text: Invoicing function &1 is not active in invoicing process &2

What causes this issue?

During execution of <DS:DE.INV_PROCESS_KK>invoicing process</> &V2&, a
situation arose that requires
<DS:DE.INV_FUNCTION_KK>invoicing function</> &V1&. However, this
function is not active in the specified invoicing process.

System Response

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

How to fix this error?

Activate the invoicing function in question, or choose an invoicing
process in which this function is active.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

FKKINV308 - Details

• The SAP error message FKKINV308 indicates that a specific invoicing function is not active in the invoicing process you are trying to execute. This error typically arises in the context of SAP Convergent Invoicing (CI) or Contract Accounts Receivable and Payable (FI-CA) when certain configurations or settings are not properly defined.
  
  Cause:
  
  Inactive Invoicing Function: The invoicing function you are trying to use is not activated in the invoicing process configuration.
  
  Configuration Issues: There may be missing or incorrect settings in the invoicing process configuration.
  Custom Development: If there are custom developments or enhancements, they may not be properly integrated or activated.
  
  
  Solution:
  
  
  Check Invoicing Function Activation:
  
  Go to the configuration settings for the invoicing process in SAP.
  Navigate to the relevant configuration path (usually found under Financial Accounting > Contract Accounts Receivable and Payable > Invoicing > Define Invoicing Functions).
  Ensure that the invoicing function indicated in the error message is activated for the invoicing process you are