How To Fix TU121 - Change not possible since MR order creation took place for schedule rec.

TU121 - Overview

• Message type: E = Error

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

• Message number: 121

• Message text: Change not possible since MR order creation took place for schedule rec.

What causes this issue?

This schedule record cannot be changed because meter reading order
creation has already been run for this schedule record.

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?

Error message extract from SAP system. Copyright SAP SE.

TU121 - Details

• The SAP error message TU121 indicates that a change to a scheduling agreement or a related document is not possible because a Material Requirements (MR) order has already been created for the schedule line in question. This typically occurs in the context of production planning and scheduling agreements in SAP.
  
  Cause:
  The error arises when:
  
  A scheduling agreement line item has been processed to the point where a Material Requirements Planning (MRP) order has been created.
  The system prevents changes to the scheduling agreement or related documents to maintain data integrity and avoid inconsistencies in the planning process.
  
  
  Solution:
  To resolve this error, you can consider the following steps:
  
  
  Check the Status of the Order: Verify if the MR order is still open or if it has been completed. If it is completed, you may need to create a new scheduling agreement or modify the existing one in a way that does not conflict with the MR