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