How To Fix DMC_GENERAL301 - Field &1 already exists in structure &2

DMC_GENERAL301 - Overview

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 301

• Message text: Field &1 already exists in structure &2

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL301 - Field &1 already exists in structure &2 ?

  The SAP error message DMC_GENERAL301, which states "Field &1 already exists in structure &2," typically occurs in the context of data modeling or data transfer processes within SAP systems, particularly when working with Data Migration Cockpit (DMC) or similar tools. This error indicates that there is an attempt to define a field that already exists in the specified structure.
  
  Cause:
  
  
  Duplicate Field Definition: The most common cause of this error is that the field you are trying to add or define already exists in the data structure you are working with. This can happen if:
  
  You are importing or defining a new data structure that has a field with the same name as an existing field.
  There is a misconfiguration in the data mapping or transformation rules.
  
  
  
  Incorrect Data Model: If you are working with a custom data model or structure, it may have been incorrectly defined, leading to duplicate field names.
  
  
  Versioning Issues: If you