MH251 - The unit of measure & for material & has not been maintained

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 251

• Message text: The unit of measure & for material & has not been maintained

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MH251 - The unit of measure & for material & has not been maintained ?

  The SAP error message MH251 indicates that a unit of measure (UoM) for a specific material has not been maintained in the system. This error typically occurs when you attempt to perform an operation (such as creating a purchase order, sales order, or inventory transaction) that requires a valid unit of measure for the specified material.
  Cause:
  
  Missing UoM Configuration: The unit of measure for the material has not been defined in the material master record.
  Incorrect Material Master Data: The material may not have been properly set up in the system, or the relevant UoM has not been assigned.
  UoM Group Issues: The unit of measure group assigned to the material may not include the required UoM.
  Data Migration Issues: If data was migrated from another system, the UoM may not have been transferred correctly.
  
  Solution:
  
  
  Maintain Material Master Data:
  
  Go to the transaction code MM02 (Change Material).
  Enter the material number and select the appropriate views (e.g., Basic Data, Purchasing, Sales).
  Ensure that the unit of measure is maintained in the relevant views.
  If necessary, add the required unit of measure in the "Units of Measure" tab.
  
  
  
  Check UoM Group:
  
  Verify that the unit of measure group assigned to the material includes the required UoM.
  You can check this in the material master under the "Basic Data" view.
  
  
  
  Create or Update UoM:
  
  If the required UoM does not exist, you may need to create it using transaction code CUNI (Maintain Units of Measure).
  Ensure that the new UoM is properly linked to the relevant UoM group.
  
  
  
  Review Configuration:
  
  If you have access, check the configuration settings in the SAP system to ensure that UoM settings are correctly defined.
  
  
  
  Data Migration Review:
  
  If the error occurred after a data migration, review the migration process to ensure that all necessary data, including UoM, was correctly imported.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  MM02: Change Material Master
  MM03: Display Material Master
  CUNI: Maintain Units of Measure
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to UoM maintenance.
  Documentation: Refer to SAP Help documentation for detailed information on material master data and unit of measure management.
  
  By following these steps, you should be able to resolve the MH251 error and ensure that the unit of measure for the material is properly maintained in the SAP system.