How To Fix VN901 - Client &: No NAST records found for output type "internal mail"

VN901 - Overview

• Message type: E = Error

• Message class: VN - Nachrichtensteuerung

• Message number: 901

• Message text: Client &: No NAST records found for output type "internal mail"

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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VN901 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  VN901 Client & : No NAST records found for output type "internal mail"
  
  Meaning / 
  Cause:
  
  The message indicates that the system tried to process an output of type "internal mail" (usually output type "MAIL" or a custom output type configured for internal email) for a particular client, but no NAST records (output control records) were found.
  NAST table stores output control records generated during document processing (e.g., purchase orders, invoices, etc.) which are used to trigger outputs like print, email, EDI, etc.
  This error typically occurs when:
  The output determination procedure did not create any output records for the specified output type.
  The output type "internal mail" is expected to be processed, but no corresponding output was generated.
  The output determination configuration is incomplete or incorrect.
  The document or transaction does not meet the conditions to generate the output.
  The output processing program or function module is