How To Fix >U128 - User &1 is already processing document transfer &2

SAP Error Message - Details

• Message type: E = Error

• Message class: >U -

• Message number: 128

• Message text: User &1 is already processing document transfer &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message >U128 - User &1 is already processing document transfer &2 ?

  The SAP error message U128 indicates that a user is already processing a document transfer, which means that the system has detected that the user (identified by &1) is currently engaged in a document transfer process for a specific document (identified by &2). This can occur in various SAP modules, particularly in scenarios involving document handling, such as in logistics or finance.
  Cause:
  
  Concurrent Processing: The user may have initiated a document transfer and has not completed it yet. This could be due to a long-running process or the user being inactive.
  Session Issues: The user might have multiple sessions open, and one session is already processing the document transfer.
  System Locking: The system may have a locking mechanism that prevents multiple users from processing the same document simultaneously to maintain data integrity.
  
  Solution:
  
  Check Active Sessions: Verify if the user has multiple active sessions. If so, close the unnecessary sessions or log out and log back in to clear any locks.
  Wait and Retry: If the user is indeed processing the document, wait for the process to complete before attempting to initiate the transfer again.
  Transaction Monitoring: Use transaction codes like SM12 (to check for locks) or SM21 (to check system logs) to identify if there are any locks or issues related to the document transfer.
  Contact Support: If the issue persists and you cannot identify the cause, it may be necessary to contact your SAP support team or administrator for further investigation. They can check for any system-level issues or configurations that might be causing the error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 for lock entries, SM21 for system logs, and ST22 for dumps.
  User Management: Ensure that user roles and authorizations are correctly set up to avoid conflicts in document processing.
  Documentation: Refer to SAP documentation or help resources for specific modules to understand how document transfers are managed and any related configurations that might affect processing.
  
  By following these steps, you should be able to resolve the U128 error and continue with the document transfer process.