How To Fix MDC_MAT_MODEL007 - Class Assignment not unique for material &1

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_MAT_MODEL -

• Message number: 007

• Message text: Class Assignment not unique for material &1

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 MDC_MAT_MODEL007 - Class Assignment not unique for material &1 ?

  The SAP error message MDC_MAT_MODEL007 with the description "Class Assignment not unique for material &1" typically occurs in the context of Material Master data management, particularly when dealing with classification in SAP.
  Cause:
  This error indicates that there is an issue with the classification of a material in the system. Specifically, it means that the material you are trying to assign to a class has multiple class assignments that are not unique. This can happen due to:
  
  Duplicate Class Assignments: The material may have been assigned to more than one class, or there may be conflicting entries in the classification data.
  Incorrect Configuration: The configuration settings for class assignments may not be set up correctly, leading to ambiguity in the classification.
  Data Integrity Issues: There may be inconsistencies or errors in the underlying data that are causing the system to be unable to determine a unique class assignment.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Class Assignments:
  
  Go to the Material Master (transaction code MM03 or MM02 for editing).
  Check the classification view for the material in question.
  Ensure that the material is assigned to only one class or that the assignments are correct and do not conflict.
  
  
  
  Review Class Configuration:
  
  Use transaction code CL02 to review the class definitions.
  Ensure that the class types and characteristics are correctly defined and that there are no overlaps or conflicts.
  
  
  
  Data Cleanup:
  
  If you find duplicate or conflicting entries, you may need to delete or correct them.
  Use transaction code CL01 to create or modify classes and ensure that the material is assigned correctly.
  
  
  
  Check for Custom Code:
  
  If there are any custom developments or enhancements in your SAP system that might affect material classification, review them to ensure they are not causing the issue.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to material classification and the specific error message for any additional guidance or known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  CL01: Create Class
  CL02: Change Class
  CL03: Display Class
  
  
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  Documentation: Review the SAP Help Portal for detailed information on Material Master and Classification.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the MDC_MAT_MODEL007 error in your SAP system.