How To Fix KF151 - Batch input session has already been opened

SAP Error Message - Details

• Message type: E = Error

• Message class: KF -

• Message number: 151

• Message text: Batch input session has already been opened

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KF151 - Batch input session has already been opened ?

  The SAP error message KF151 indicates that a batch input session has already been opened for the same data or transaction. This typically occurs when a batch input session is attempted to be created while another session for the same data is still active or has not been processed completely.
  Causes:
  
  Duplicate Session Creation: The most common cause is that a batch input session for the same transaction is already in process or has not been closed properly.
  Session Locking: The session may be locked due to a previous error or an incomplete processing of the batch input.
  User Error: The user may have inadvertently tried to create a new session without realizing that one already exists.
  
  Solutions:
  
  
  Check Existing Sessions:
  
  Go to transaction SM35 (Batch Input Monitoring) to check for any existing batch input sessions.
  Look for sessions that are in the status of "Processing" or "Error" and review their details.
  
  
  
  Process or Delete Existing Sessions:
  
  If you find an existing session that is still open, you can either process it or delete it if it is no longer needed.
  If the session is in error status, you may need to correct the errors and reprocess it.
  
  
  
  Session Management:
  
  Ensure that your batch input sessions are managed properly. After processing, sessions should be closed or deleted to avoid conflicts.
  Implement checks in your batch input logic to prevent duplicate session creation.
  
  
  
  Review Batch Input Program:
  
  If you are using a custom program to create batch input sessions, review the logic to ensure it checks for existing sessions before attempting to create a new one.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may address this issue or provide additional guidance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM35: Batch Input Monitoring
  SM37: Job Monitoring (to check if any background jobs are related to the batch input)
  
  
  
  Batch Input Sessions: These are used in SAP to process large volumes of data by simulating user input. They are often used for data migration or mass updates.
  
  
  Error Handling: Implement robust error handling in your batch input processes to ensure that sessions are closed properly even in the event of an error.
  
  
  By following these steps, you should be able to resolve the KF151 error and manage your batch input sessions effectively.