How To Fix /LTB/MC016 - Selection is already running. Please, wait for its finish and try again.

SAP Error Message - Details

• Message type: E = Error

• Message class: /LTB/MC -

• Message number: 016

• Message text: Selection is already running. Please, wait for its finish and try again.

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /LTB/MC016 - Selection is already running. Please, wait for its finish and try again. ?

  The SAP error message /LTB/MC016 Selection is already running. Please, wait for its finish and try again typically occurs in the context of background processing or batch jobs in SAP, particularly when dealing with data selection or processing tasks that are already in progress. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  
  Concurrent Execution: The error indicates that a selection process (like a report or data extraction) is already running in the background. This can happen if:
  
  A user has initiated the same selection process multiple times.
  A scheduled job is currently executing the same task.
  There is a long-running process that has not yet completed.
  
  
  
  Locking Mechanism: SAP uses a locking mechanism to prevent multiple instances of the same process from running simultaneously, which can lead to data inconsistencies.
  
  
  Solution:
  
  
  Wait for Completion: The simplest solution is to wait for the current selection process to finish. You can check the status of background jobs using transaction codes like SM37 (for monitoring jobs) to see if the job is still running.
  
  
  Check for Duplicate Requests: Ensure that you or other users are not inadvertently starting the same selection process multiple times. If you find duplicate requests, you may need to cancel the unnecessary ones.
  
  
  Cancel the Running Job: If the job is taking too long and you need to stop it, you can cancel it from the SM37 transaction. However, be cautious with this approach, as it may lead to data inconsistencies if the job is in the middle of processing.
  
  
  Review Job Logs: If the job is stuck or taking an unusually long time, review the job logs for any errors or issues that may have caused the delay.
  
  
  System Performance: If this issue occurs frequently, it may be worth investigating the overall performance of the SAP system. High load or resource contention can lead to longer processing times.
  
  
  Consult with Basis Team: If the problem persists, it may be necessary to involve your SAP Basis team to investigate system performance, locks, or other underlying issues.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM37 (Job Monitoring), SM21 (System Log), and ST22 (Dump Analysis) for troubleshooting.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific transaction or process you are working with.
  Documentation: Review SAP documentation for the specific module or process you are using to understand any limitations or best practices.
  
  By following these steps, you should be able to resolve the error and understand the underlying issues that may be causing it.