How To Fix C$390 - The system has found non-unique characteristic assignments

SAP Error Message - Details

• Message type: E = Error

• Message class: C$ -

• Message number: 390

• Message text: The system has found non-unique characteristic assignments

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message C$390 - The system has found non-unique characteristic assignments ?

  The SAP error message C$390, which states "The system has found non-unique characteristic assignments," typically occurs in the context of SAP's classification system, particularly when dealing with characteristics and classes in the classification of materials or other objects.
  Cause:
  This error arises when there are multiple assignments of the same characteristic to a class or object, which leads to ambiguity. In SAP, each characteristic should have a unique assignment to ensure that the system can correctly identify and process the data. Non-unique assignments can occur due to:
  
  Duplicate Entries: The same characteristic is assigned multiple times to a class or object.
  Incorrect Configuration: The configuration of characteristics and classes may not be set up correctly, leading to overlaps.
  Data Migration Issues: If data has been migrated from another system, it may have introduced duplicates or inconsistencies.
  
  Solution:
  To resolve the C$390 error, you can follow these steps:
  
  
  Identify Duplicates:
  
  Go to the classification view of the material or object that is causing the error.
  Check the list of characteristics assigned to the class or object and look for duplicates.
  
  
  
  Remove Duplicates:
  
  If you find duplicate characteristics, remove the unnecessary assignments to ensure that each characteristic is unique.
  
  
  
  Check Class Configuration:
  
  Review the configuration of the class and its characteristics in the SAP system. Ensure that the characteristics are defined correctly and that there are no overlaps.
  
  
  
  Data Consistency Check:
  
  If the error occurred after a data migration, perform a consistency check on the data to identify and rectify any issues.
  
  
  
  Use Transaction Codes:
  
  You can use transaction codes like CL02 (Change Class) or CL03 (Display Class) to manage characteristics and classes.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on managing characteristics and classes.
  
  
  
  Related Information:
  
  Classification System: Understand how the classification system works in SAP, including the role of classes and characteristics.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error.
  User Roles: Ensure that you have the necessary permissions to make changes to classifications and characteristics in the system.
  
  By following these steps, you should be able to resolve the C$390 error and ensure that your classification data is unique and correctly configured.