How To Fix SWN002 - 'Public' must be entered as the instance generation for class '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: SWN - WF Notif: Messages

• Message number: 002

• Message text: 'Public' must be entered as the instance generation for class '&1'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWN002 - 'Public' must be entered as the instance generation for class '&1' ?

  The SAP error message SWN002 indicates that there is an issue with the instance generation for a specific class in the SAP system. This error typically arises in the context of the SAP Workflow Notification (SWN) framework, which is used to send notifications to users regarding workflow events.
  Cause:
  The error message "SWN002 'Public' must be entered as the instance generation for class '&1'" suggests that the instance generation type for the specified class (denoted by &1) is not set correctly. In this case, the system expects the instance generation type to be set to 'Public', but it is either missing or set to a different value.
  Solution:
  To resolve this error, you need to ensure that the instance generation type for the specified class is set to 'Public'. Here are the steps to do this:
  
  
  Access the Class Definition:
  
  Go to transaction code SE24 (Class Builder).
  Enter the name of the class that is causing the error and click on "Display".
  
  
  
  Check Instance Generation:
  
  In the class definition, navigate to the "Attributes" tab.
  Look for the "Instance Generation" field. Ensure that it is set to 'Public'.
  
  
  
  Modify if Necessary:
  
  If the instance generation is not set to 'Public', change it to 'Public'.
  Save your changes.
  
  
  
  Recheck the Workflow Configuration:
  
  After making the changes, you may also want to check the workflow configuration to ensure that everything is set up correctly.
  
  
  
  Test the Workflow:
  
  Trigger the workflow again to see if the error persists.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SWN1: Workflow Notification Configuration
  SWU3: Automatic Workflow Customizing
  SWI1: Work Item Selection
  
  
  
  Documentation:
  
  Refer to SAP Help documentation for Workflow and Notification settings for more detailed guidance on configuring workflows and notifications.
  
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes that might address specific issues related to the SWN framework or the error message SWN002.
  
  
  
  By following these steps, you should be able to resolve the SWN002 error and ensure that the instance generation for the specified class is correctly configured.