How To Fix MRNB021 - Invoice posted: &1/&2

SAP Error Message - Details

• Message type: E = Error

• Message class: MRNB - Messages for Revaluation (Retro Active Pricing)

• Message number: 021

• Message text: Invoice posted: &1/&2

What causes this issue?

Invoice posted: &V1&/&V2&

System Response

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

How to fix this error?

<DS:TRAN.MIR4>Display Invoice / Credit Memo</>

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MRNB021 - Invoice posted: &1/&2 ?

  The SAP error message MRNB021 ("Invoice posted: &1/&2") typically indicates that an invoice has already been posted for a particular purchase order (PO) or goods receipt (GR). This error can occur in various scenarios, such as when trying to post a new invoice for a PO that has already been invoiced or when attempting to reverse an invoice that has already been processed.
  Cause:
  
  Duplicate Invoice Posting: The most common cause is that an invoice for the specified PO or GR has already been posted in the system.
  Incorrect Invoice Reference: The invoice being processed may reference a PO or GR that has already been fully invoiced.
  System Configuration: There may be settings in the system that prevent multiple invoices from being posted against the same PO or GR.
  
  Solution:
  
  Check Invoice History: Review the invoice history for the specific PO or GR to confirm if an invoice has already been posted. You can do this by using transaction codes like MIRO (Invoice Verification) or ME23N (Display Purchase Order).
  Use the Correct Invoice: If you are trying to post a new invoice, ensure that it is for a different delivery or that it is a valid adjustment to the existing invoice.
  Reverse or Adjust Existing Invoice: If you need to make changes to an already posted invoice, consider reversing the existing invoice (if applicable) and then posting a new one.
  Consult with Your SAP Administrator: If you believe this message is incorrect or if you need to change system settings, consult with your SAP administrator or support team to review the configuration and settings related to invoice processing.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  MIRO: Invoice Verification
  ME23N: Display Purchase Order
  MR8M: Cancel Invoice Document
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to invoice processing that may address this error.
  Documentation: Review SAP documentation or user manuals related to invoice processing and error handling for further insights.
  
  By following these steps, you should be able to identify the cause of the MRNB021 error and take appropriate action to resolve it.