How To Fix /LTB/MC030 - Selection is already running (user &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: /LTB/MC -

• Message number: 030

• Message text: Selection is already running (user &1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /LTB/MC030 - Selection is already running (user &1) ?

  The SAP error message /LTB/MC030 Selection is already running (user &1) typically occurs in the context of background processing or batch jobs in SAP, particularly when using the Logistics Execution or Warehouse Management modules. This error indicates that a selection or processing job is already running for the user specified in the message, which prevents a new instance of the same job from being initiated.
  Cause:
  
  Concurrent Execution: The most common cause is that the user is trying to execute a report or transaction that is already running in the background. SAP restricts concurrent executions of certain processes to avoid data inconsistencies or performance issues.
  Stuck Job: Sometimes, a job may be stuck or not completed properly, leading to the system thinking that the job is still running.
  User Lock: The user may have initiated a process that has not yet completed, and the system is designed to prevent multiple instances of the same process from running simultaneously.
  
  Solution:
  
  
  Check Background Jobs: 
  
  Go to transaction code SM37 to check the status of background jobs. Look for jobs that are running under your user ID. If you find the job that is causing the issue, you can either wait for it to complete or cancel it if it is stuck.
  
  
  
  Wait for Completion: If the job is running and is expected to complete, you may need to wait until it finishes before attempting to run the selection again.
  
  
  Cancel Stuck Jobs: If you identify a job that is stuck, you can cancel it from the SM37 transaction. Select the job and choose the option to cancel it.
  
  
  Check for Locks: Use transaction SM12 to check for any locks that may be preventing the job from completing. If you find locks that are no longer needed, you can delete them (ensure you have the necessary authorizations).
  
  
  Contact Basis Team: If you are unable to resolve the issue, it may be necessary to contact your SAP Basis team for assistance. They can help investigate further and may have tools to clear any stuck processes.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM37: Monitor Background Jobs
  SM12: Display and Delete Locks
  SM21: System Log (to check for any related errors)
  
  
  
  User Authorizations: Ensure that you have the necessary authorizations to view and manage background jobs and locks.
  
  
  Documentation: Refer to SAP Help documentation for more details on background processing and job management.
  
  
  By following these steps, you should be able to resolve the error and successfully execute your selection or report.