How To Fix WB2B518 - Purchase Unit of Measure &1 was re-determined for material &2, Item &3

SAP Error Message - Details

• Message type: E = Error

• Message class: WB2B - Trading Contract

• Message number: 518

• Message text: Purchase Unit of Measure &1 was re-determined for material &2, Item &3

Self-Explanatory Message

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• What is the cause and solution for SAP error message WB2B518 - Purchase Unit of Measure &1 was re-determined for material &2, Item &3 ?

  The SAP error message WB2B518 indicates that the purchase unit of measure for a specific material has been re-determined during a transaction, which can occur in various scenarios such as during the creation of a purchase order or when processing a purchase requisition. This message typically arises when there is a mismatch or inconsistency in the unit of measure settings for the material in question.
  Cause:
  
  Unit of Measure Configuration: The purchase unit of measure defined in the material master may not match the unit of measure used in the purchasing document.
  Material Master Data: The material master data may have been changed, leading to a re-evaluation of the purchase unit of measure.
  Purchasing Info Record: The purchasing info record for the material may have different settings that conflict with the material master.
  Conversion Factors: There may be issues with the conversion factors between different units of measure defined in the material master.
  
  Solution:
  
  Check Material Master: Review the material master data (transaction code MM03) for the material in question. Ensure that the purchase unit of measure is correctly defined and matches the expected values.
  Review Purchasing Info Records: Check the purchasing info record (transaction code ME13) for the material and vendor combination to ensure that the unit of measure is consistent with the material master.
  Update Unit of Measure: If necessary, update the unit of measure in the material master or the purchasing info record to ensure consistency.
  Check Conversion Factors: Verify the conversion factors between different units of measure in the material master to ensure they are correctly set up.
  Consult Documentation: If the issue persists, consult SAP documentation or reach out to your SAP support team for further assistance.
  
  Related Information:
  
  Transaction Codes: 
  
  MM03: Display Material Master
  ME13: Display Purchasing Info Record
  ME21N: Create Purchase Order
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  User Exits and BAdIs: If custom logic is involved in the purchasing process, review any user exits or BAdIs that may affect the determination of the purchase unit of measure.
  
  By following these steps, you should be able to identify the cause of the WB2B518 error and implement the necessary corrections to resolve it.