How To Fix FKKBIX405 - Billable item class &2 uses processing rule that is not allowed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 405

• Message text: Billable item class &2 uses processing rule that is not allowed

What causes this issue?

A <DS:DE.BIT0INS_KK>processing rule</> is assigned to the
<DS:DE.BITCAT_KK>billable item class</> &v2&, but this rule is not
allowed for classes that are based on interface component &v1&.
It is not possible to return incorrect items. Instead they are added as
raw data.

System Response

Class &v2& cannot accept any one-off charges from CRM.

How to fix this error?

Assign one of the following processing rules to the billable item class:
1 ? Add all items as raw data
2 ? Add items with errors as raw data

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FKKBIX405 - Billable item class &2 uses processing rule that is not allowed ?

  The SAP error message FKKBIX405 indicates that there is an issue with the processing rule associated with a billable item class in the context of billing or invoicing. This error typically arises when the system encounters a billable item class that is configured to use a processing rule that is not permitted or is incorrectly set up.
  Cause:
  
  Incorrect Configuration: The billable item class may be configured to use a processing rule that is not valid for the type of transaction being processed.
  Missing or Inactive Processing Rule: The processing rule that the billable item class is trying to use may not exist, or it may be inactive.
  Incompatibility: The processing rule may not be compatible with the specific settings or parameters of the billable item class.
  
  Solution:
  
  
  Check Configuration:
  
  Go to the configuration settings for the billable item class in the SAP system.
  Verify that the processing rule assigned to the billable item class is valid and appropriate for the intended use.
  
  
  
  Review Processing Rules:
  
  Navigate to the processing rules configuration in the SAP system.
  Ensure that the processing rule is active and correctly defined.
  If necessary, create a new processing rule that meets the requirements of the billable item class.
  
  
  
  Adjust Billable Item Class:
  
  If the processing rule is not suitable, consider changing the billable item class to one that uses a valid processing rule.
  Alternatively, modify the existing billable item class to align with the correct processing rule.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources related to billing and invoicing to understand the requirements for processing rules and billable item classes.
  
  
  
  Testing:
  
  After making changes, perform tests to ensure that the error no longer occurs and that the billing process works as expected.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as SPRO (for configuration) or SE11 (for data dictionary) to access the relevant settings.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles: Ensure that you have the necessary permissions to make changes to the configuration settings.
  
  If the issue persists after following these steps, it may be beneficial to consult with an SAP functional consultant or support team for further assistance.