How To Fix MW118 - Class types of base plant group & not correct

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 118

• Message text: Class types of base plant group & not correct

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MW118 - Class types of base plant group & not correct ?

  The SAP error message MW118, which states "Class types of base plant group & not correct," typically occurs in the context of material management and classification in SAP. This error indicates that there is a mismatch or inconsistency in the class types associated with a specific base plant group.
  Cause:
  
  Incorrect Class Type Assignment: The class type assigned to the material or the base plant group may not be valid or correctly configured.
  Configuration Issues: There may be issues in the configuration of the classification system in SAP, particularly in the Customizing settings for class types and characteristics.
  Missing or Incorrect Master Data: The material master data or the classification data may be incomplete or incorrectly maintained.
  Plant Group Settings: The settings for the plant group may not align with the expected class types.
  
  Solution:
  
  
  Check Class Type Configuration:
  
  Go to the Customizing settings in SAP (Transaction SPRO).
  Navigate to the section for Material Management and check the configuration for class types and characteristics.
  Ensure that the class types assigned to the base plant group are correctly defined.
  
  
  
  Review Material Master Data:
  
  Use transaction MM03 to display the material master data.
  Check the classification view to ensure that the correct class type is assigned to the material.
  If necessary, update the material master data to reflect the correct class type.
  
  
  
  Validate Plant Group Settings:
  
  Check the settings for the base plant group in the system.
  Ensure that the class types associated with the plant group are valid and correctly configured.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources related to classification and class types to ensure compliance with best practices.
  
  
  
  Testing:
  
  After making changes, perform tests to ensure that the error no longer occurs when trying to create or modify materials associated with the base plant group.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  MM03 (Display Material)
  SPRO (Customizing)
  CL02 (Change Class)
  CL03 (Display Class)
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on configuration.
  
  
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to make changes to material master data and classification settings.
  
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in Material Management and Classification.