How To Fix WH064 - EAN & is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: WH - Messages for store physical inventory (DRS)

• Message number: 064

• Message text: EAN & is not unique

What causes this issue?

In the system there are several material numbers stored for an
EAN.

System Response

The system cannot update this item.

How to fix this error?

Correct the material master data and start inbound processing for
this intermediate document again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WH064 - EAN & is not unique ?

  Certainly! Here's a detailed explanation regarding the SAP error message WH064: EAN & is not unique:
  
  SAP Error Message: WH064 - EAN & is not unique
  Message Text:
  
  EAN & is not unique
  
  Cause
  
  The error occurs when you try to create or assign an EAN (European Article Number) or barcode to a material or packaging unit in the Warehouse Management (WM) or Logistics Execution (LE) module, and the system detects that the same EAN already exists for another material or packaging unit.
  EANs must be unique identifiers for materials or packaging units within the system to avoid confusion in scanning and inventory management.
  This error typically arises during:
  
  Material master data maintenance (e.g., in transaction MM02 or MM01)
  Packaging material assignment
  Warehouse management processes involving EANs
  
  
  The system checks the EAN master data table (e.g., MARA, MAKT, or specific EAN tables like MARM, EAN table) and finds a duplicate entry.
  
  
  Solution
  
  
  Check Existing EAN Assignments:
  
  Use transaction MM03 (Display Material) or MM04 (Display Material Changes) to check which material currently has the EAN assigned.
  Alternatively, use table browser (SE16/SE16N) on tables like MARM (Units of Measure for Material), EAN or EANNR to find the material linked to the EAN.
  
  
  
  Verify the EAN:
  
  Confirm if the EAN you are trying to assign is correct and intended for the material.
  If the EAN is mistakenly assigned to another material, you need to correct the assignment.
  
  
  
  Remove or Change Duplicate EAN:
  
  If the EAN is wrongly assigned to another material, remove or change it from that material.
  Then assign it to the correct material.
  
  
  
  Use Unique EANs:
  
  Ensure that each material or packaging unit has a unique EAN.
  If you need to assign the same EAN to multiple materials (which is generally not recommended), you may need to review your business process or consult with your SAP functional consultant.
  
  
  
  Check Packaging Material EANs:
  
  If the error occurs during packaging material assignment, verify the packaging material master data and EAN assignments.
  
  
  
  Consult SAP Notes:
  
  Sometimes, specific SAP Notes address issues related to EAN uniqueness and related configuration.
  
  
  
  
  Related Information
  
  
  Tables involved:
  
  MARM - Units of Measure for Material (contains EANs)
  EAN or EANNR - EAN master data tables
  MARA - General Material Data
  PACK - Packaging Material Data
  
  
  
  Transactions:
  
  MM01/MM02/MM03 - Material Master Maintenance
  LSMW or custom programs for mass EAN upload
  SE16/SE16N - Table display for checking EAN assignments
  
  
  
  Business Impact:
  
  Duplicate EANs can cause scanning errors in warehouse processes.
  Incorrect inventory postings or picking errors.
  Problems in integration with external systems (e.g., barcode scanners, EDI).
  
  
  
  Best Practices:
  
  Maintain a clean and unique EAN master data.
  Use proper validation during data upload or material creation.
  Regularly audit EAN assignments.
  
  
  
  
  If you provide the exact context or transaction where the error occurs, I can help with more specific steps.