How To Fix /SEHS/DG_DG666 - Error while determining expected delivery via user exit

/SEHS/DG_DG666 - Overview

• Message type: E = Error

• Message class: /SEHS/DG_DG -

• Message number: 666

• Message text: Error while determining expected delivery via user exit

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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/SEHS/DG_DG666 - Details

• The SAP error message /SEHS/DG_DG666 typically indicates an issue related to the determination of expected delivery dates in the context of a user exit. This error can occur in various scenarios, particularly when customizing or enhancing standard SAP functionality through user exits or BAdIs (Business Add-Ins).
  
  Cause:
  
  User Exit Logic: The error may arise from incorrect or incomplete logic in the user exit that is responsible for calculating the expected delivery date. This could be due to missing data, incorrect calculations, or unhandled exceptions.
  Data Issues: There may be issues with the data being processed, such as missing or incorrect material master data, vendor information, or purchase order details.
  
  Configuration Issues: Incorrect configuration settings in the relevant modules (like MM, SD, or PP) can lead to this error.
  Custom Code: If there is custom code that interacts with the expected delivery date calculation, it may not be functioning as intended.
  
  
  Solution:
  
  
  Debugging the User Exit: 
  
  Use the