How To Fix VN128 - Partner data incomplete (Partner number is missing)

VN128 - Overview

• Message type: E = Error

• Message class: VN - Nachrichtensteuerung

• Message number: 128

• Message text: Partner data incomplete (Partner number is missing)

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.

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VN128 - Details

• Certainly! Here's a detailed explanation for the SAP error message VN128 - Partner data incomplete (Partner number is missing):
  
  Error Message:
  VN128 - Partner data incomplete (Partner number is missing)
  
  
  Cause:
  This error occurs when the system expects partner data (such as vendor, customer, or other business partner) to be entered in a document or transaction, but the partner number field is left blank or missing.
  In SAP, many transactions require partner information to be complete for processing. For example, in purchasing documents (like Purchase Orders), sales documents, or vendor master data maintenance, the partner number is mandatory to identify the business partner involved.
  Common scenarios causing this error:
  
  Partner number field is not filled in during document creation.
  Partner determination procedure is not correctly configured, so the system does not automatically propose a partner.
  Partner role is assigned but the partner number is missing.
  Data entry error or incomplete master data.
  
  
  
  Solution:
  
  
  Enter the Partner Number:
  
  Check the transaction or document where