How To Fix /PLMU/PPE_ENG_UI128 - Simulation &1 already exists; you are not authorized to change it

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMU/PPE_ENG_UI -

• Message number: 128

• Message text: Simulation &1 already exists; you are not authorized to change it

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 /PLMU/PPE_ENG_UI128 - Simulation &1 already exists; you are not authorized to change it ?

  The SAP error message /PLMU/PPE_ENG_UI128 Simulation &1 already exists; you are not authorized to change it typically occurs in the context of the SAP Production Planning and Execution (PP/PE) module, particularly when dealing with simulations or planning scenarios. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Existing Simulation: The error indicates that a simulation with the identifier &1 already exists in the system. This means that the system has detected a duplicate entry for the simulation you are trying to create or modify.
  Authorization Issues: The user attempting to make changes does not have the necessary authorizations to modify the existing simulation. This could be due to role restrictions or missing authorizations in the user's profile.
  
  Solutions:
  
  
  Check Existing Simulations:
  
  Navigate to the relevant transaction or application where simulations are managed (e.g., transaction codes related to planning or simulation).
  Look for the simulation with the identifier &1 to confirm its existence and status.
  
  
  
  Modify or Delete Existing Simulation:
  
  If you have the necessary authorizations, you can either modify the existing simulation or delete it if it is no longer needed.
  If you do not have the required authorizations, contact your SAP security administrator to request access or to perform the necessary actions on your behalf.
  
  
  
  Create a New Simulation:
  
  If the existing simulation is valid and you cannot modify it, consider creating a new simulation with a different identifier or name to avoid conflicts.
  
  
  
  Authorization Check:
  
  Review your user roles and authorizations related to the PP/PE module. Ensure that you have the necessary permissions to create or modify simulations.
  If you find that you lack the required authorizations, reach out to your SAP security team to request the necessary access.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in SAP for managing simulations, such as C223 (for simulation in production planning) or other related codes depending on your specific SAP setup.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are documented in SAP Notes.
  Documentation: Review SAP documentation or help files related to the PP/PE module for more context on managing simulations and understanding authorization roles.
  
  By following these steps, you should be able to resolve the error and continue with your work in SAP. If the issue persists, consider reaching out to SAP support for further assistance.