How To Fix MM334 - Class & of material type & is not maintained in material &

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 334

• Message text: Class & of material type & is not maintained in material &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM334 - Class & of material type & is not maintained in material & ?

  The SAP error message MM334 indicates that a specific class and material type combination is not maintained for a given material. This error typically arises in the Materials Management (MM) module when trying to perform operations related to materials that require classification, such as creating or changing a material master record.
  Cause:
  The error occurs due to one of the following reasons:
  
  Missing Class Assignment: The material type you are trying to use is not assigned to the classification system or does not have a class assigned to it.
  Incorrect Material Type: The material type specified does not have a corresponding class defined in the system.
  Configuration Issues: The configuration settings for the material type or class may not be properly set up in the system.
  
  Solution:
  To resolve the MM334 error, you can follow these steps:
  
  
  Check Material Type Configuration:
  
  Go to the transaction code SPRO to access the SAP Customizing Implementation Guide.
  Navigate to Logistics - General > Material Master > Settings for Key Fields > Define Material Types.
  Ensure that the material type in question is correctly configured and that it is assigned to the appropriate class.
  
  
  
  Assign Class to Material Type:
  
  In the same configuration area, check if the material type is assigned to a classification system.
  If not, you may need to create a new class or assign an existing class to the material type.
  
  
  
  Create or Maintain Class:
  
  Use transaction code CL02 to maintain the class.
  Ensure that the class is properly defined and that it includes the necessary characteristics.
  
  
  
  Check Material Master Record:
  
  Use transaction code MM03 to display the material master record.
  Verify that the material type and class are correctly assigned.
  
  
  
  Consult Documentation:
  
  If you are unsure about the configuration, refer to SAP documentation or consult with your SAP Basis or MM consultant for guidance.
  
  
  
  Testing:
  
  After making the necessary changes, test the transaction again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  CL02: Change Class
  SPRO: Customizing Implementation Guide
  
  
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  
  
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to make changes to material types and classes.
  
  
  By following these steps, you should be able to resolve the MM334 error and maintain the necessary configurations for your materials in SAP.