How To Fix SO123 - A reply to the document has already been sent

SO123 - Overview

• Message type: E = Error

• Message class: SO - SAPoffice: message texts

• Message number: 123

• Message text: A reply to the document has already been sent

What causes this issue?

A reply to the document has already been sent.

System Response

How to fix this error?

You can send other replies to this document without using one of the
reply functions. However, these replies will not be recorded in the
correspondence history.

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 SO123 - A reply to the document has already been sent ?

  The SAP error message SO123, which states "A reply to the document has already been sent," typically occurs in the context of document processing, particularly when dealing with sales orders, invoices, or other related documents. This error indicates that an attempt is being made to send a reply or response to a document that has already been processed or responded to.
  
  Cause:
  
  Duplicate Action: The most common cause of this error is that the system has already processed a reply to the document in question. This could happen if a user or automated process attempts to send a response again.
  System Configuration: There may be specific configurations or settings in the SAP system that prevent multiple replies to the same document.
  Workflow Issues: If the document is part of a workflow, it may have already been completed, and any further actions are restricted.
  User Error: A user may mistakenly attempt to resend a document or