How To Fix WS479 - Message type of message &1 was changed manually

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 479

• Message text: Message type of message &1 was changed manually

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS479 - Message type of message &1 was changed manually ?

  SAP Error Message:
  
  WS479 - Message type of message &1 was changed manually
  
  Cause:
  This message appears when the message type of a standard SAP message has been manually changed in the system. In SAP, messages (like error, warning, information messages) have predefined message types (e.g., E for error, W for warning, I for information). Changing the message type manually (for example, changing an error message to a warning) is generally not recommended because it can affect the standard behavior of SAP programs and processes.
  The system detects that the message type for a particular message number (indicated by &1) has been altered from its original standard setting.
  
  Explanation:
  
  SAP standard messages are delivered with a fixed message type.
  If a user or consultant changes the message type manually in transaction SE91 (Message Maintenance), the system logs this as a warning or error.
  This is often done to change the behavior of a message (e.g., to prevent a process from stopping on an error by converting it to a warning).
  However, such changes can lead to inconsistent system behavior or issues during upgrades/support packs.
  
  
  Solution:
  
  
  Review the Change:
  
  Go to transaction SE91 (Message Maintenance).
  Enter the message class and message number indicated by the error.
  Check the current message type and compare it with the original SAP standard message type.
  
  
  
  Restore Original Message Type:
  
  If the change was unintentional or causing issues, restore the message type to the original SAP standard value.
  You may need to refer to SAP standard documentation or a clean SAP system to verify the original message type.
  
  
  
  If Change is Required:
  
  If the business process requires the message type to be changed, document the change thoroughly.
  Consider implementing a user-exit or enhancement to handle the message differently instead of changing the message type directly.
  Be aware that such changes might be overwritten during SAP upgrades or support package installations.
  
  
  
  Transport and Testing:
  
  If you restore or change the message type, ensure the change is transported properly.
  Test the affected processes thoroughly to confirm that the message behavior is as expected.
  
  
  
  
  Related Information:
  
  Transaction SE91: Used to maintain message classes and messages.
  SAP Notes: Check for any SAP Notes related to message WS479 or the specific message number.
  Best Practice: Avoid changing standard SAP message types directly. Use enhancements or custom messages if different behavior is needed.
  Upgrade Impact: Manual changes to standard messages can be lost during upgrades or support package implementations.
  
  
  Summary:
  
  Cause: Manual change of the message type for a standard SAP message.
  Solution: Verify and restore the original message type in SE91 or handle message behavior via enhancements.
  Precaution: Avoid direct changes to standard messages; document and test thoroughly if changes are necessary.
  
  
  If you provide the specific message class and number, I can help you check the original message type or suggest alternatives.