How To Fix SO391 - Expand private distribution lists before combining

SO391 - Overview

• Message type: E = Error

• Message class: SO - SAPoffice: message texts

• Message number: 391

• Message text: Expand private distribution lists before combining

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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SO391 - Details

• The SAP error message SO391, which states "Expand private distribution lists before combining," typically occurs when you are trying to send an email or a message using a distribution list that contains private distribution lists. In SAP, private distribution lists are not automatically expanded when you attempt to combine them with other recipients.
  
  Cause:
  The error arises because the system requires that all private distribution lists be expanded into their individual members before they can be combined with other recipients for sending emails. This is a safeguard to ensure that all intended recipients are included in the communication.
  
  Solution:
  To resolve this error, you need to manually expand the private distribution lists before attempting to send the email or message. Here are the steps you can follow:
  
  
  Identify the Private Distribution List: Determine which private distribution list is causing the issue.
  
  
  Expand the Distribution List:
  
  Go to the transaction code for sending emails (e.g., SO10 for text