How To Fix /MOC/CONFIG128 - MIME type &1 is already assigned to document type

SAP Error Message - Details

• Message type: E = Error

• Message class: /MOC/CONFIG -

• Message number: 128

• Message text: MIME type &1 is already assigned to document type

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 /MOC/CONFIG128 - MIME type &1 is already assigned to document type ?

  The SAP error message /MOC/CONFIG128 MIME type &1 is already assigned to document type typically occurs in the context of the SAP Document Management System (DMS) or when configuring MIME types for document types in SAP. This error indicates that the MIME type you are trying to assign to a document type is already associated with another document type.
  Cause:
  
  Duplicate Assignment: The MIME type you are trying to assign is already linked to a different document type in the system.
  Configuration Error: There may be a misconfiguration in the MIME type settings or document type settings.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Existing Assignments:
  
  Go to the transaction code OAC0 (or the relevant configuration transaction for MIME types).
  Check the existing assignments of MIME types to document types. Look for the MIME type indicated in the error message.
  
  
  
  Modify or Remove Assignment:
  
  If the MIME type is already assigned to another document type and you need to use it for a different one, you may need to either:
  
  Remove the existing assignment if it is no longer needed.
  Change the MIME type of the document type that currently has it assigned.
  
  
  
  
  
  Create a New MIME Type:
  
  If the MIME type is essential for both document types, consider creating a new MIME type that is similar but distinct, and assign it to the required document type.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for more details on MIME type configuration and document types.
  
  
  
  Check for Custom Code:
  
  If there are any custom developments or enhancements in your SAP system, ensure that they are not interfering with the standard MIME type assignments.
  
  
  
  Related Information:
  
  MIME Types: MIME (Multipurpose Internet Mail Extensions) types are used to specify the nature and format of a document. They are crucial for handling files in web applications and document management systems.
  Document Types: In SAP, document types are used to categorize documents and define their properties and behaviors.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OAC0 for MIME type configuration and OAC3 for document type configuration.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or DMS support team for further assistance.