How To Fix COM_DML_ENGINE123 - Do not change independent subobjects using superior object

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_DML_ENGINE - MDF Processing Layer

• Message number: 123

• Message text: Do not change independent subobjects using superior object

What causes this issue?

In the master data framework you can create complex objects that have
subobjects. The subobjects can also exist independently of the main
object (then they have an external key), or fully dependent on the
main object.
Subobjects that are dependent on the main object can be processed only
in combination with main object.
Independent subobjects, as in this case, can only be processed as
independent objects, and not together with the main object.

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 COM_DML_ENGINE123 - Do not change independent subobjects using superior object ?

  The SAP error message COM_DML_ENGINE123 ("Do not change independent subobjects using superior object") typically occurs in the context of SAP's Composite Application Framework (CAF) or when dealing with Composite Objects in SAP. This error indicates that there is an attempt to modify an independent subobject through its superior object, which is not allowed.
  Cause:
  
  Independent Subobjects: In SAP, subobjects can be dependent or independent. Independent subobjects are designed to be managed separately from their superior objects. Attempting to change them through the superior object violates the rules of object management in SAP.
  Data Model Violation: The data model enforces certain relationships and constraints. Changing an independent subobject through its superior object can lead to inconsistencies in the data model.
  Incorrect Logic in Code: If you are using custom code or enhancements, there may be logic that incorrectly attempts to modify the subobject.
  
  Solution:
  
  Direct Modification: Instead of trying to modify the independent subobject through the superior object, access the subobject directly and perform the necessary changes.
  Review Object Relationships: Ensure that you understand the relationships between the superior object and its subobjects. Make sure that your logic adheres to the defined relationships.
  Check Custom Code: If you have custom code that is causing this error, review it to ensure that it is not trying to modify independent subobjects incorrectly.
  Use Appropriate Methods: If you are using methods to manipulate objects, ensure that you are using the correct methods for independent subobjects. Look for methods specifically designed for handling independent subobjects.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Composite Objects and the Composite Application Framework for more details on object relationships and management.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  Debugging: Use debugging tools in SAP to trace the execution flow and identify where the error is being triggered. This can help you pinpoint the exact cause of the issue.
  
  By following these steps, you should be able to resolve the error and ensure that your application adheres to the rules governing object relationships in SAP.