How To Fix KMAT_MIGR021 - Class type &1 is not a variant class type

SAP Error Message - Details

• Message type: E = Error

• Message class: KMAT_MIGR - Message Class for Migration of Variants to IBase

• Message number: 021

• Message text: Class type &1 is not a variant class 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.

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 KMAT_MIGR021 - Class type &1 is not a variant class type ?

  The SAP error message KMAT_MIGR021 indicates that there is an issue related to class types in the context of configurable materials (KMAT). Specifically, the error message states that the class type you are trying to work with is not a variant class type. This typically occurs during the migration or configuration of variant configuration settings in SAP.
  Cause:
  
  Incorrect Class Type: The class type specified in the error message is not a variant class type. In SAP, variant class types are typically defined for configurable materials, and they must be set up correctly to allow for the configuration of products.
  Configuration Issues: There may be issues with the configuration of the class or the material that is being referenced. This could include missing or incorrect settings in the class type definition.
  Data Migration Issues: If you are migrating data from one system to another, the class type may not have been correctly defined or migrated.
  
  Solution:
  
  Check Class Type: Verify that the class type you are using is indeed a variant class type. You can do this by navigating to the class type in the SAP system and checking its attributes.
  
  Use transaction code CL02 to display the class and check its type.
  
  
  Correct Class Assignment: If the class type is incorrect, you may need to assign the correct variant class type to the material or configuration object.
  Review Configuration Settings: Ensure that all necessary configuration settings for the class and the material are correctly defined. This includes checking the characteristics and their values.
  Data Migration Review: If this error occurred during a data migration process, review the migration process to ensure that all relevant class types and their attributes were correctly migrated.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on configuring variant classes and resolving related issues.
  
  Related Information:
  
  Variant Configuration: Understand the principles of variant configuration in SAP, which allows for the creation of configurable products based on customer requirements.
  Class Types in SAP: Familiarize yourself with the different class types in SAP, especially those related to variant configuration (e.g., class type 300 for variant classes).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.