How To Fix V4343 - External document number &1 does not match reference document number &2

SAP Error Message - Details

• Message type: E = Error

• Message class: V4 - Nachrichten Verkauf (Variable Meldungen und EDI-Meldungen)

• Message number: 343

• Message text: External document number &1 does not match reference document number &2

What causes this issue?

The external document number sent in the IDoc was not correctly copied
into the newly created invoice.

System Response

The IDoc ends with status 51.

How to fix this error?

Check:
- Whether the external document number was sent correctly in the IDoc.
The document number is transferred in segment E1EDK01, field DOCNO.
- Whether a correct copy routine is set up. In the standard delivery
copying requirement 024 or 025 is provided at item level for copying
from delivery to billing. This transfers the document number sent from
an external source.

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 V4343 - External document number &1 does not match reference document number &2 ?

  The SAP error message V4343 indicates a mismatch between an external document number and a reference document number during a transaction, typically in the context of invoice verification or document processing. This error can occur in various scenarios, such as when processing invoices, credit memos, or other financial documents.
  Cause:
  The error arises when the system detects that the external document number (which is usually provided by an external system or is expected to match a specific format) does not correspond to the reference document number (which is the internal SAP document number). This can happen due to several reasons:
  
  Data Entry Error: The external document number may have been entered incorrectly.
  Mismatch in Document Types: The document types may not align, leading to a mismatch.
  Incorrect Configuration: The system may not be configured correctly to recognize the external document number.
  Document Not Found: The reference document may not exist in the system, or it may have been deleted or archived.
  Integration Issues: If the external document number is coming from an integrated system, there may be issues with the data transfer or mapping.
  
  Solution:
  To resolve the V4343 error, you can take the following steps:
  
  
  Verify Document Numbers: Check both the external document number and the reference document number for accuracy. Ensure that they are entered correctly and match the expected formats.
  
  
  Check Document Existence: Ensure that the reference document exists in the SAP system. You can do this by searching for the document using transaction codes like ME23N (for purchase orders) or FB03 (for financial documents).
  
  
  Review Configuration: If the error persists, review the configuration settings related to document processing in SAP. This may involve checking the settings for document types, number ranges, and external number assignment.
  
  
  Consult Integration Logs: If the external document number is coming from an integrated system, check the integration logs for any errors or issues that may have occurred during data transfer.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting the SAP Help Portal for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME23N, FB03, or others related to the specific document type you are working with.
  SAP Notes: Check for any SAP Notes related to this error message in the SAP Support Portal, as there may be specific patches or updates that address known issues.
  Documentation: Review SAP documentation for best practices on handling external document numbers and reference documents.
  
  By following these steps, you should be able to identify the cause of the V4343 error and implement a solution to resolve it.