How To Fix WS663 - Document type &1 can only be set automatically by the system

WS663 - Overview

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 663

• Message text: Document type &1 can only be set automatically by the system

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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WS663 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS663 - Document type &1 can only be set automatically by the system
  
  
  Cause:
  This error occurs when a user tries to manually enter or change a document type in a transaction or document where the system expects the document type to be assigned automatically. Certain document types in SAP are system-controlled and cannot be manually selected or modified by users because they are linked to specific business processes or system logic.
  For example, document types related to system-generated documents such as payment documents, clearing documents, or special postings are often set automatically by the system to ensure data consistency and process integrity.
  
  When does it typically occur?
  
  When trying to manually enter a document type in a transaction that only allows system-assigned document types.
  When customizing or posting documents where the document type is predefined by the system.
  During automatic postings or background jobs where