How To Fix WG449 - PO &1 rejected: multiple use

SAP Error Message - Details

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 449

• Message text: PO &1 rejected: multiple use

Self-Explanatory Message

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• What is the cause and solution for SAP error message WG449 - PO &1 rejected: multiple use ?

  SAP Error Message:
  
  WG449 PO &1 rejected: multiple use
  
  Meaning / Cause:
  This error occurs when a Purchase Order (PO) number is being used multiple times in a context where it is expected to be unique. Typically, this happens during Goods Receipt (GR) or Invoice Verification processes where the system detects that the PO number has already been referenced or processed, and the current transaction attempts to reuse it in a way that is not allowed.
  Common scenarios include:  
  
  Attempting to post a goods receipt or invoice referencing the same PO item multiple times incorrectly.  
  Using a PO number in a process that requires unique document references, but the PO number is duplicated.  
  Configuration or master data issues where the PO number is not properly controlled for uniqueness in the relevant process.
  
  
  Where it occurs:
  
  Goods Receipt (MIGO)  
  Invoice Verification (MIRO)  
  Other procurement-related transactions involving PO references
  
  
  Solution / How to fix:
  
  
  Check the PO usage:
  
  Verify if the PO number &1 (the actual PO number will be shown in the message) has already been used in the current process or document. For example, check if a goods receipt or invoice referencing this PO has already been posted.
  
  
  Check document references:
  
  Ensure that the PO number is not being duplicated in the same document or across documents where uniqueness is required.
  
  
  Review the process:  
  
  If you are trying to post multiple goods receipts or invoices for the same PO, ensure that the quantities and items are correctly managed and that partial deliveries/invoices are handled properly.  
  If the PO is being referenced multiple times incorrectly, adjust the process to avoid multiple usage.
  
  
  
  Check configuration:
  
  Sometimes, this error can be related to settings in the system that control document number ranges or reference checks. Review the relevant configuration in Materials Management (MM) or Invoice Verification.
  
  
  Master data check:
  
  Verify the PO master data for correctness and consistency.
  
  
  Consult SAP Notes:
  
  Search for SAP Notes related to message WG449 for any known bugs or patches.
  
  
  
  Additional Information:
  
  The message text "PO &1 rejected: multiple use" indicates that the system is enforcing uniqueness of the PO number in the current context.  
  This is a standard SAP message from the Materials Management (MM) module.  
  The message class is usually WG (related to Goods Movement or Invoice Verification).
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error message
  WG449 PO &1 rejected: multiple use
  
  
  Cause
  PO number used multiple times where unique usage is required
  
  
  Solution
  Check for duplicate usage of PO in documents/processes; correct quantities; review configuration and master data
  
  
  Module
  Materials Management (MM)
  
  
  
  
  If you provide the exact transaction or scenario where this error occurs, I can help with more specific troubleshooting steps.