How To Fix WRF_AT145 - Synchronization is not possible when purchase order UoMs differ

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_AT - Messages for Allocation Table RTFASH

• Message number: 145

• Message text: Synchronization is not possible when purchase order UoMs differ

What causes this issue?

You tried to change the order unit for a distribution center. You can
only do this, however, when the order units are the same for all
distribution centers of an allocation table.

System Response

The system does not synchronize the entries.

How to fix this error?

Set the same order unit for all distribution centers.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_AT145 - Synchronization is not possible when purchase order UoMs differ ?

  Certainly! Here's a detailed explanation regarding the SAP error message WRF_AT145: Synchronization is not possible when purchase order UoMs differ:
  
  Error Message
  WRF_AT145: Synchronization is not possible when purchase order UoMs differ
  
  Cause
  This error occurs during the synchronization process between the Purchase Order (PO) and the related documents (such as Goods Receipt, Invoice, or Service Entry Sheet) when the Unit of Measure (UoM) in the PO differs from the UoM in the document you are trying to synchronize or post.
  In SAP, the system expects the UoM to be consistent across related documents to ensure correct quantity and value postings. If the UoM in the PO line item is different from the UoM in the document (e.g., Goods Receipt or Invoice), the system cannot synchronize the data because it cannot directly compare or convert the quantities without explicit conversion factors.
  
  When does it typically occur?
  
  When you try to create or post a Goods Receipt or Invoice referencing a PO line item, and the UoM in the document differs from the PO UoM.
  When synchronization between the PO and related documents is attempted in scenarios like Service Entry Sheets, Delivery, or Invoice Verification.
  When the PO was created with one UoM, but the vendor delivers or invoices in a different UoM without proper conversion.
  
  
  Solution
  
  
  Check and Align UoMs:
  
  Verify the UoM in the Purchase Order line item.
  Verify the UoM in the document you are trying to post (Goods Receipt, Invoice, etc.).
  Ensure that the UoMs are the same or that proper conversion factors exist.
  
  
  
  Use Correct UoM in Documents:
  
  When posting Goods Receipt or Invoice, use the same UoM as in the PO.
  If the vendor delivers in a different UoM, the PO should be maintained with the base UoM or the purchasing UoM that matches the delivery.
  
  
  
  Maintain Conversion Factors:
  
  If different UoMs are necessary, maintain conversion factors between the PO UoM and the delivery/invoice UoM in the material master (Unit of Measure tab).
  SAP can then convert quantities automatically during posting.
  
  
  
  Adjust PO or Document:
  
  If the PO UoM is incorrect or not suitable, consider changing the PO UoM (if possible) to match the vendor's delivery UoM.
  Alternatively, request the vendor to deliver and invoice in the PO UoM.
  
  
  
  Check Customizing Settings:
  
  In some cases, custom validations or user exits might enforce strict UoM checks. Review any custom code or validations that might cause this error.
  
  
  
  
  Additional Information
  
  Material Master UoM Settings: The base unit of measure and alternative units of measure should be properly maintained in the material master to allow smooth conversion.
  Purchase Order UoM: The PO UoM is usually the purchasing unit of measure and should be consistent with vendor delivery and invoicing.
  SAP Notes: Check for any SAP Notes related to WRF_AT145 for specific patches or updates.
  Transaction Codes: 
  
  ME23N (Display PO)
  MIGO (Goods Receipt)
  MIRO (Invoice Verification)
  ML81N (Service Entry Sheet)
  
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  PO UoM differs from the UoM in the document being synchronized (GR, Invoice, etc.)
  
  
  Effect
  Synchronization fails; system cannot post or update related documents
  
  
  Solution
  Align UoMs between PO and documents; maintain conversion factors in material master; adjust PO or document UoMs accordingly
  
  
  Related Info
  Check material master UoM settings, vendor delivery UoM, and SAP Notes for updates
  
  
  
  
  If you provide the exact transaction or scenario where this error occurs, I can help with more tailored steps.