How To Fix DT121 - Name & is identical or is in same namespace as &

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 121

• Message text: Name & is identical or is in same namespace as &

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT121 - Name & is identical or is in same namespace as & ?

  The SAP error message DT121 indicates that there is a naming conflict in the system. Specifically, it means that the name you are trying to use for a new object (like a data element, domain, or other repository object) is either identical to an existing object or is in the same namespace as an existing object. This can happen when you are trying to create a new object with a name that is already taken or when the naming conventions do not allow for the creation of objects with similar names.
  Cause:
  
  Duplicate Name: You are attempting to create an object with a name that already exists in the system.
  Namespace Conflict: The name you are trying to use is in the same namespace as another object, which is not allowed.
  Incorrect Naming Convention: The naming conventions for the specific type of object you are creating may not allow for similar names.
  
  Solution:
  
  Check Existing Objects: Use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), or SE84 (Repository Information System) to search for existing objects with the same name or in the same namespace.
  Rename Your Object: Choose a different name for your new object that does not conflict with existing names. Ensure that it adheres to the naming conventions of your organization and SAP.
  Use a Different Namespace: If applicable, consider using a different namespace for your custom objects to avoid conflicts with standard SAP objects or other custom objects.
  Consult Documentation: Review SAP documentation or guidelines regarding naming conventions and object creation to ensure compliance.
  
  Related Information:
  
  Naming Conventions: Familiarize yourself with the naming conventions used in your SAP environment. This can vary based on the organization and the type of objects being created.
  Namespace Management: Understand how namespaces are managed in your SAP system, especially if you are working in a multi-client environment.
  Transport Requests: If you are working with transport requests, ensure that the objects you are creating are properly included and do not conflict with existing objects in the target system.
  
  By following these steps, you should be able to resolve the DT121 error and successfully create your object in SAP.