How To Fix USMD_CMM012 - Model type &1 doesn't specify any key component for entity type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD_CMM -

• Message number: 012

• Message text: Model type &1 doesn't specify any key component for entity type &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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message USMD_CMM012 - Model type &1 doesn't specify any key component for entity type &2 ?

  The SAP error message USMD_CMM012 indicates that there is an issue with the model type configuration in the SAP Master Data Governance (MDG) system. Specifically, it means that the model type you are working with does not specify a key component for the entity type you are trying to use. This can occur during data modeling or when trying to create or modify master data.
  Cause:
  
  Missing Key Component Definition: The model type defined in the system does not have a key component assigned for the specified entity type. Key components are essential for uniquely identifying records in the master data.
  Incorrect Model Type Configuration: The configuration of the model type may be incomplete or incorrect, leading to the absence of a key component for the entity type.
  Data Model Changes: If there have been recent changes to the data model or entity types, it may have resulted in the key component not being properly defined.
  
  Solution:
  
  
  Check Model Type Configuration:
  
  Go to the SAP MDG configuration settings and check the model type associated with the entity type in question.
  Ensure that the key component is defined for the model type. You can do this by navigating to the relevant configuration area in the SAP MDG customizing settings.
  
  
  
  Define Key Components:
  
  If the key component is missing, you will need to define it. This typically involves specifying which fields in the entity type should be treated as key fields.
  You can do this by accessing the data model configuration and editing the model type to include the necessary key components.
  
  
  
  Review Data Model:
  
  If there have been recent changes to the data model, review those changes to ensure that they have been implemented correctly and that all necessary components are defined.
  
  
  
  Testing:
  
  After making the necessary changes, test the configuration by attempting to create or modify the master data again to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as MDGIMG to access the configuration settings for MDG.
  Documentation: Refer to the SAP Help Portal or specific MDG documentation for detailed guidance on configuring model types and key components.
  Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who specializes in MDG.
  
  By following these steps, you should be able to identify and resolve the issue related to the USMD_CMM012 error message.