How To Fix /LTB/MC014 - Simulation 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: 014

• Message text: Simulation 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /LTB/MC014 - Simulation is already running. Please, wait for its finish and try again. ?

  The SAP error message /LTB/MC014 Simulation is already running. Please, wait for its finish and try again typically occurs in the context of the SAP Advanced Planning and Optimization (APO) module, particularly when dealing with simulations or planning runs. This error indicates that a simulation process is already in progress, and the system does not allow multiple instances of the same simulation to run concurrently.
  Cause:
  
  Concurrent Simulation: The most common cause is that a simulation process has been initiated and is still running. The system prevents starting a new simulation until the current one is completed.
  Long-Running Processes: If the simulation takes a long time to complete, users may attempt to start it again, leading to this error.
  System Locking: Sometimes, the system may not release the lock on the simulation process due to an error or a crash, causing it to think that the simulation is still running.
  
  Solution:
  
  Wait for Completion: The simplest solution is to wait for the current simulation to finish. You can check the status of the simulation in the relevant transaction or monitoring tool.
  Check Background Jobs: If you have access, check the background jobs in transaction SM37 to see if the simulation is still running. If it is, you may need to wait or contact the user who initiated it.
  Terminate the Process: If you determine that the simulation is stuck or has failed, you may need to terminate the process. This can be done through transaction SM37 by selecting the job and choosing to cancel it.
  System Monitoring: Use transaction SM66 to monitor all active processes in the system. This can help identify if the simulation is running on another application server.
  Consult Logs: Check the application logs or system logs for any errors that might indicate why the simulation is not completing.
  Contact Support: If the issue persists and you cannot resolve it, consider reaching out to your SAP support team for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (Job Monitoring), SM66 (Global Work Process Overview), and SLG1 (Application Log) for troubleshooting.
  Documentation: Review SAP documentation related to the specific APO module you are using, as there may be specific guidelines or known issues related to simulations.
  User Training: Ensure that users are trained on how to properly initiate and monitor simulations to avoid overlapping processes.
  
  By following these steps, you should be able to address the error and understand the underlying issues related to simulation processes in SAP.