How To Fix M3490 - Unit of measure & is not defined; check your entry

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 490

• Message text: Unit of measure & is not defined; check your entry

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Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message M3490 - Unit of measure & is not defined; check your entry ?

  The SAP error message M3490 indicates that the unit of measure (UoM) you are trying to use in a transaction is not defined in the system. This can occur in various contexts, such as when creating or updating material master records, purchase orders, or sales orders.
  Cause:
  
  Undefined Unit of Measure: The specific unit of measure you are trying to use has not been defined in the system.
  Incorrect Entry: There may be a typo or incorrect entry in the unit of measure field.
  Missing Configuration: The unit of measure may not be configured for the material or in the relevant organizational unit.
  Data Inconsistency: There may be inconsistencies in the master data that prevent the system from recognizing the unit of measure.
  
  Solution:
  
  Check the Unit of Measure: Verify that the unit of measure you are trying to use is correctly spelled and formatted.
  Define the Unit of Measure:
  
  Go to the transaction code CUNI (Maintain Units of Measure).
  Check if the unit of measure exists. If it does not, you can create it by entering the necessary details.
  
  
  Assign the Unit of Measure to Material:
  
  If the unit of measure is valid, ensure it is assigned to the relevant material in the material master record.
  Use transaction code MM02 to modify the material master and check the units of measure in the Basic Data or Purchasing views.
  
  
  Check Configuration: Ensure that the unit of measure is configured correctly in the relevant settings, such as in the material type or purchasing organization.
  Consult Documentation: If you are unsure about the correct unit of measure to use, consult your organization's documentation or guidelines.
  
  Related Information:
  
  Unit of Measure Types: SAP supports various types of units of measure, such as base units, alternative units, and sales units. Make sure you are using the correct type for your transaction.
  Unit of Measure Conversion: If you are working with multiple units of measure, ensure that conversion factors are defined correctly in the system.
  Authorization: Ensure you have the necessary authorizations to create or modify units of measure and material master records.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or refer to SAP Notes for any specific patches or updates related to this error.