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

M3490 - Overview

• 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.

M3490 - Details

• 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