How To Fix W_CB278 - There are several documents with the external no. &1 and supplier &2

W_CB278 - Overview

• Message type: E = Error

• Message class: W_CB -

• Message number: 278

• Message text: There are several documents with the external no. &1 and supplier &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message W_CB278 - There are several documents with the external no. &1 and supplier &2 ?

  Certainly! Here's a detailed explanation for the SAP error message W_CB278:
  
  SAP Message: W_CB278
  Text: There are several documents with the external no. &1 and supplier &2
  
  
  Cause:
  This warning message occurs when you try to post or process a document (usually an invoice or credit memo) in SAP, and the system finds multiple existing documents with the same external document number (&1) for the same supplier (&2).
  
  The external document number is typically the number assigned by the vendor or supplier on their invoice or credit memo.
  SAP expects this external document number to be unique per supplier to avoid duplicate postings.
  When multiple documents with the same external number exist for the same supplier, SAP raises this warning to alert the user about a potential duplicate or data inconsistency.
  
  
  When does it occur?
  
  During invoice verification (transaction codes like MIRO, MIR7, or related).
  When entering or posting vendor invoices or credit memos.
  When the system checks for duplicate invoices