How To Fix TU755 - Item on due date &1 cannot be unlocked as already invoiced

SAP Error Message - Details

• Message type: E = Error

• Message class: TU - Billing/Scheduling/Budget Billing

• Message number: 755

• Message text: Item on due date &1 cannot be unlocked as already invoiced

What causes this issue?

The item for due date &V1& cannot be unlocked because it has already
been invoiced or the invoice was not reversed.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TU755 - Item on due date &1 cannot be unlocked as already invoiced ?

  The SAP error message TU755 indicates that an item on a due date cannot be unlocked because it has already been invoiced. This typically occurs in the context of logistics and billing processes within SAP, particularly when dealing with sales orders, deliveries, or billing documents.
  Cause:
  
  Invoicing Completed: The item in question has already been invoiced, meaning that the financial transaction has been completed, and the system does not allow changes to the item status.
  Document Status: The document (e.g., sales order, delivery) is in a status that prevents further modifications because it has been processed for billing.
  Business Rules: Business rules or configurations in the SAP system may restrict changes to items that have been invoiced to maintain data integrity and financial accuracy.
  
  Solution:
  
  Check Invoice Status: Verify the status of the invoice related to the item. If the invoice is indeed completed, you may need to consider whether you can reverse or credit the invoice if changes are necessary.
  Review Document Flow: Use transaction codes like VA03 (Display Sales Order) or VL03N (Display Delivery) to check the document flow and see how the item is linked to the invoicing process.
  Unlocking Process: If you need to unlock the item for legitimate reasons (e.g., correcting an error), you may need to reverse the invoice first. This can be done using transaction codes like VF11 (Cancel Invoice) or VF02 (Change Invoice) depending on your requirements.
  Consult with Finance: If the item cannot be unlocked due to financial implications, consult with your finance team to understand the best course of action.
  SAP Notes and Support: Check for any relevant SAP Notes or documentation that may provide additional guidance on handling this error. If necessary, contact SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as VF01 (Create Invoice), VF02 (Change Invoice), VF03 (Display Invoice), and VF11 (Cancel Invoice).
  User Authorizations: Ensure that you have the necessary authorizations to make changes to invoices and related documents.
  Business Processes: Understand the business processes in your organization regarding invoicing and document management to avoid similar issues in the future.
  Training and Documentation: Consider training sessions or documentation for users involved in the invoicing process to minimize errors and improve understanding of the system.
  
  By following these steps, you should be able to address the TU755 error effectively.