How To Fix CNV_20400_CHECK043 - Some source controlling areas are not assigned to an operating concern

CNV_20400_CHECK043 - Overview

• Message type: E = Error

• Message class: CNV_20400_CHECK - Messages for check functions (controlling area merge)

• Message number: 043

• Message text: Some source controlling areas are not assigned to an operating concern

What causes this issue?

One or more controlling areas are not assigned to OC &V1& but reference
controlling area is. No technical preparation is needed, but all source
controlling areas will use CO-PA after conversion. (CO-PA customizing
has to be checked and adjusted for additional controlling areas.)

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.

CNV_20400_CHECK043 - Details

• The SAP error message CNV_20400_CHECK043 indicates that some source controlling areas are not assigned to an operating concern. This error typically arises during the data migration process, particularly when using the SAP Conversion or Migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer methods.
  
  Cause:
  The error occurs because the system requires that all controlling areas involved in the migration process must be assigned to an operating concern. An operating concern is a key organizational unit in SAP that is used for Profitability Analysis (CO-PA). If any controlling area is not linked to an operating concern, the system cannot proceed with the migration or data transfer.
  
  Solution:
  To resolve this error, you need to ensure that all controlling areas are properly assigned to an operating concern. Here are the steps to do this:
  
  
  Check Controlling Area Assignment:
  
  Go to the SAP GUI and navigate to the transaction code OKKP (Controlling Area).
  Check the