How To Fix USMD1409 - Data model &1: DDIC structure &2 cannot be automatically modified

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 409

• Message text: Data model &1: DDIC structure &2 cannot be automatically modified

What causes this issue?

The data dictionary (DDIC) structure &V2& contains a complex APPEND
structure.

System Response

The DDIC structure &V2& has not been changed.

How to fix this error?

You need to use the ABAP Dictionary to make changes directly to DDIC
structure &V2& . Changes will be necessary if data model &V1& was
changed for the
respective entity type.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1409 - Data model &1: DDIC structure &2 cannot be automatically modified ?

  The SAP error message USMD1409 indicates that there is an issue with the Data Model in the context of SAP Master Data Governance (MDG). Specifically, it states that the Data Dictionary (DDIC) structure cannot be automatically modified. This error typically arises during the process of data model adjustments or when trying to implement changes to the data model that involve DDIC structures.
  Cause:
  
  
  Incompatible Changes: The changes you are trying to make to the data model may not be compatible with the existing DDIC structure. This can happen if the changes involve altering fields, data types, or other attributes that cannot be automatically adjusted by the system.
  
  
  Custom Fields: If you are trying to add or modify custom fields that are not properly defined or are conflicting with existing definitions, this can lead to this error.
  
  
  Transport Issues: If the changes are being transported from one system to another (e.g., from development to production), there may be issues with the transport request that prevent the changes from being applied correctly.
  
  
  Authorization Issues: Lack of proper authorizations to modify the DDIC structures can also lead to this error.
  
  
  Solution:
  
  
  Manual Adjustment: If the system cannot automatically modify the DDIC structure, you may need to manually adjust the DDIC structure using transaction codes like SE11 (Data Dictionary) or SE14 (Database Utility) to ensure that it aligns with the changes you are trying to implement.
  
  
  Check Custom Fields: Review any custom fields or modifications you are trying to implement. Ensure that they are correctly defined and do not conflict with existing structures.
  
  
  Transport Request Review: If this error occurs during a transport, check the transport request for any inconsistencies or missing objects. Ensure that all necessary objects are included in the transport.
  
  
  Authorization Check: Verify that you have the necessary authorizations to make changes to the DDIC structures. If not, contact your system administrator to obtain the required permissions.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific data model you are working with. There may be specific guidelines or prerequisites for making changes.
  
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide insights based on the specific context of your implementation.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and MDG-specific transactions for data model management.
  SAP Notes: Search for SAP Notes related to USMD1409 for any known issues or patches that may address the problem.
  MDG Documentation: Review the Master Data Governance documentation for best practices on data model changes and management.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.