How To Fix /SAPAPO/OM_ERROR2128 - Transactional simulation already exists

/SAPAPO/OM_ERROR2128 - Overview

• Message type: E = Error

• Message class: /SAPAPO/OM_ERROR2 -

• Message number: 128

• Message text: Transactional simulation already exists

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_ERROR2128 - Transactional simulation already exists ?

  The SAP error message /SAPAPO/OM_ERROR2128 indicates that a transactional simulation already exists in the system. This error typically occurs in the context of SAP Advanced Planning and Optimization (APO) when a user attempts to create a new simulation while another one is already active or has not been properly closed.
  
  Cause:
  
  Existing Simulation: The most common cause is that there is already an active simulation session in the system. This can happen if a previous simulation was not properly closed or if multiple users are trying to create simulations simultaneously.
  Session Management: The system may not have released the previous simulation due to a session management issue or a timeout.
  User Lock: Sometimes, a user lock may prevent the creation of a new simulation if the previous one is still considered active.
  
  
  Solution:
  
  
  Check Active Simulations: 
  
  Go to the relevant transaction in SAP APO (e.g., /SAPAPO/OM for order management) and check if there are any active