How To Fix KMAT_MIGR020 - Class type &1 does not exist

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 020

• Message text: Class type &1 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message KMAT_MIGR020 - Class type &1 does not exist ?

  The SAP error message KMAT_MIGR020: Class type &1 does not exist typically occurs during the migration or processing of configurable materials (KMAT) in SAP. This error indicates that the system is trying to reference a class type that has not been defined in the system.
  Cause:
  
  
  Missing Class Type: The specified class type (indicated by &1 in the error message) does not exist in the SAP system. This could be due to:
  
  The class type was never created.
  The class type was deleted or not transported correctly from a development environment to the production environment.
  A configuration error where the class type is incorrectly referenced in the material master or configuration settings.
  
  
  
  Incorrect Configuration: The configuration settings for the configurable material may be pointing to a class type that is not valid or has been changed.
  
  
  Solution:
  
  
  Check Class Type:
  
  Go to transaction CL02 (Change Class) or CL03 (Display Class) in SAP.
  Enter the class type number that is indicated in the error message to check if it exists.
  If it does not exist, you may need to create it using transaction CL01 (Create Class).
  
  
  
  Create or Restore Class Type:
  
  If the class type is missing, create a new class type or restore it from a backup if it was deleted.
  Ensure that the class type is properly configured with the necessary characteristics.
  
  
  
  Review Material Master Data:
  
  Check the material master data for the configurable material that is causing the error. Ensure that it is correctly linked to the appropriate class type.
  Use transaction MM03 (Display Material) to review the material settings.
  
  
  
  Transport Issues:
  
  If the class type was supposed to be transported from another system (e.g., development to production), check the transport logs to ensure that the transport was successful and that the class type was included.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to configurable materials and class types for any additional guidance or known issues.
  
  
  
  Related Information:
  
  Class Types: In SAP, class types are used to categorize characteristics for materials, and they play a crucial role in the configuration of configurable materials (KMAT).
  Configurable Materials: These are materials that can be customized based on customer requirements, and they rely on class types to define their characteristics.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as SAP frequently updates its software to address known issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or technical team for further investigation.