How To Fix FKKBIX624 - Enter a function module in the calculation rule

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKBIX - Conv.Inv.: Billing (Invoice Preprocessing)

• Message number: 624

• Message text: Enter a function module in the calculation rule

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 FKKBIX624 - Enter a function module in the calculation rule ?

  The SAP error message FKKBIX624, which states "Enter a function module in the calculation rule," typically occurs in the context of configuring calculation rules for financial transactions, particularly in the area of account determination or during the setup of certain financial processes.
  
  Cause:
  This error arises when a calculation rule is defined without specifying a function module. Function modules are essential in SAP for executing specific calculations or logic during processing. If the system expects a function module to be defined in the calculation rule but finds none, it triggers this error.
  
  Solution:
  To resolve the FKKBIX624 error, follow these steps:
  
  
  Access the Calculation Rule Configuration:
  
  Navigate to the relevant configuration area in SAP where the calculation rules are defined. This is typically found under the Financial Accounting (FI) or Controlling (CO) modules.
  
  
  
  Identify the Calculation Rule:
  
  Locate the specific calculation rule that is causing the error. This may involve checking the settings for the relevant transaction or