How To Fix FKKINV396 - Billing item type &1 is either unknown or not allowed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 396

• Message text: Billing item type &1 is either unknown or not allowed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKKINV396 - Billing item type &1 is either unknown or not allowed ?

  The SAP error message FKKINV396 indicates that the billing item type specified in the transaction is either unknown or not allowed in the context of the operation being performed. This error typically occurs in the context of contract accounts receivable and payable (FI-CA) when processing billing documents.
  Causes:
  
  Incorrect Billing Item Type: The billing item type specified may not exist in the system or may not be configured correctly.
  Configuration Issues: The billing item type may not be allowed for the specific transaction or process you are trying to execute.
  Missing Customization: The billing item type may not have been properly set up in the system, or it may not be assigned to the relevant billing process.
  Authorization Issues: The user may not have the necessary authorizations to use the specified billing item type.
  
  Solutions:
  
  Check Billing Item Type: Verify that the billing item type specified in the transaction is correct and exists in the system. You can do this by checking the configuration in the SAP system.
  Review Configuration: Go to the configuration settings for billing item types in the SAP system (Transaction code: SPRO) and ensure that the billing item type is correctly defined and allowed for the relevant processes.
  Adjust Customization: If the billing item type is missing or incorrectly configured, you may need to create or adjust the configuration for that billing item type.
  User Authorizations: Ensure that the user executing the transaction has the necessary authorizations to use the specified billing item type.
  Consult Documentation: Review SAP documentation or consult with your SAP support team for specific details related to the billing item type and its allowed usage.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like OBB2 (for defining billing item types) or FQEVENT (for event management) to check or modify configurations.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance related to this error message.
  Testing: After making any changes, perform testing to ensure that the error is resolved and that the billing process works as expected.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP support team or consult with an SAP expert for further assistance.