How To Fix MM189 - The external material group & does not exist

MM189 - Overview

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 189

• Message text: The external material group & does not exist

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 MM189 - The external material group & does not exist ?

  The SAP error message MM189, which states "The external material group & does not exist," typically occurs in the Materials Management (MM) module when you are trying to use an external material group that has not been defined in the system. This can happen during various transactions, such as creating or updating material master records, or when processing purchase orders.
  
  Cause:
  
  Non-Existent External Material Group: The external material group you are trying to use has not been created or is not available in the system.
  Incorrect Input: There may be a typo or incorrect entry in the external material group field.
  Data Migration Issues: If data was migrated from another system, the external material groups may not have been properly imported.
  Authorization Issues: The user may not have the necessary permissions to view or use the external material group.
  
  
  Solution:
  
  
  Check the External Material Group:
  
  Go to the transaction code OMD1 (or the relevant transaction for your version)