How To Fix KI503 - The control data is already being processed by &

KI503 - Overview

• Message type: E = Error

• Message class: KI -

• Message number: 503

• Message text: The control data is already being processed by &

What causes this issue?

DEFINE &USER& = &V1&
INCLUDE MESSAGE_ENQUEUE_USER OBJECT DOKU ID TX
You want to process plan or control data that is already being processed
by user &V1&. To prevent the data from being overwritten, it is locked.

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?

Wait until the locked data has been released again.
Alternatively, contact user &V1&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KI503 - The control data is already being processed by & ?

  The SAP error message KI503, which states "The control data is already being processed by &," typically occurs in the context of controlling (CO) module transactions, particularly when dealing with internal orders, cost centers, or other controlling objects. This error indicates that the system is trying to process control data that is already being processed by another user or session.
  
  Cause:
  
  Concurrent Processing: The most common cause of this error is that another user or session is currently processing the same control data. This can happen if multiple users are trying to post transactions or make changes to the same internal order or cost center simultaneously.
  Lock Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. When one user is working on a particular piece of data, it gets locked, and other users trying to access it will receive this error message.
  Long-running Transactions: If a transaction takes a long time to complete,