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

TU755 - Overview

• 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.

TU755 - Details

• 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