How To Fix WPOC012 - Order acknowledgements already exist for purchase order &, item &

SAP Error Message - Details

• Message type: E = Error

• Message class: WPOC - Messages for Package WPOC

• Message number: 012

• Message text: Order acknowledgements already exist for purchase order &, item &

Self-Explanatory Message

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• What is the cause and solution for SAP error message WPOC012 - Order acknowledgements already exist for purchase order &, item & ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WPOC012 - Order acknowledgements already exist for purchase order &, item &
  
  Cause:
  This message occurs when you attempt to create or process an order acknowledgement (order confirmation) for a purchase order (PO) item for which an order acknowledgement already exists in the system.
  In SAP MM (Materials Management), an order acknowledgement is a confirmation from the vendor that they have received the purchase order and confirm the delivery schedule, quantities, and other details. The system prevents duplicate acknowledgements for the same PO item to avoid inconsistencies.
  
  Explanation:
  
  The system checks if an order acknowledgement document already exists for the given PO and item.
  If it finds an existing acknowledgement, it issues this warning/error to prevent duplicate entries.
  This is a safeguard to maintain data integrity and avoid conflicting confirmations.
  
  
  Solution:
  
  
  Check Existing Order Acknowledgements:
  
  Use transaction ME23N (Display Purchase Order) or ME9F (Message Output) to check if an order acknowledgement has already been created for the PO item.
  You can also check the order acknowledgement documents or confirmations linked to the PO.
  
  
  
  If Duplicate Acknowledgement is Not Required:
  
  Do not create a new order acknowledgement for the same PO item.
  Use the existing acknowledgement for further processing.
  
  
  
  If You Need to Change the Existing Acknowledgement:
  
  Modify the existing order acknowledgement document instead of creating a new one.
  If the existing acknowledgement is incorrect or incomplete, coordinate with the vendor or responsible department to update it.
  
  
  
  If You Intend to Create a New Acknowledgement (e.g., for a new delivery schedule):
  
  Ensure that the new acknowledgement is for a different schedule line or item.
  If the system still blocks creation, check if the existing acknowledgement can be deleted or reversed (if business process allows).
  
  
  
  Technical/Configuration Check:
  
  Verify the message control settings in transaction NACE for output type related to order acknowledgements.
  Check if the system is configured to allow multiple acknowledgements per PO item or restricts it.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  ME23N - Display Purchase Order
  ME9F - Message Output for Purchase Orders
  ME22N - Change Purchase Order (to check/change acknowledgements)
  NACE - Output Control (to configure message types)
  
  
  
  SAP Notes:
  
  Check SAP Notes related to order acknowledgements and message control if you suspect a system bug or need further customization.
  
  
  
  Business Process:
  
  Order acknowledgements are part of the procurement process to confirm vendor commitments.
  Duplicate acknowledgements can cause confusion in delivery scheduling and inventory planning.
  
  
  
  
  Summary:
  The error WPOC012 indicates that an order acknowledgement already exists for the specified purchase order and item. To resolve it, verify existing acknowledgements and avoid creating duplicates. Modify or update existing acknowledgements if necessary, and review output/message control settings if the issue persists.
  
  If you need help with specific steps or transaction navigation, feel free to ask!