How To Fix APO_BAPI178 - No transactional simulations are open

SAP Error Message - Details

• Message type: E = Error

• Message class: APO_BAPI - Message Class for APO BAPIs

• Message number: 178

• Message text: No transactional simulations are open

What causes this issue?

You want to execute an update (COMMIT) or a ROLLBACK. However, there is
no transactional simulation open in the current mode that could be
updated or rolled back.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

The function used (BAPI) may only be called if a transactional
simulation is to be updated or rolled back. Check your scenario to see
in what sequence functions (BAPIs) should be called.
Have functions (BAPIs) already been called that have opened a
transactional simulation?
Has the update or ROLLBACK been called several times so that no more
transactional simulations are available?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message APO_BAPI178 - No transactional simulations are open ?

  The SAP error message APO_BAPI178: No transactional simulations are open typically occurs in the context of SAP Advanced Planning and Optimization (APO) when a user attempts to perform an operation that requires an active simulation, but no such simulation is currently open.
  Cause:
  
  No Active Simulation: The most common cause of this error is that there are no active transactional simulations available in the system. This can happen if the user has not started a simulation or if all simulations have been closed.
  Session Management: The user may have inadvertently closed the simulation session or navigated away from it.
  Authorization Issues: In some cases, the user may not have the necessary authorizations to access or create a simulation.
  
  Solution:
  
  
  Start a New Simulation:
  
  Navigate to the relevant transaction in APO (e.g., SNP, DP) and create a new simulation. Ensure that you follow the correct steps to initiate a simulation.
  In the planning book or the relevant application, look for options to create or start a new simulation.
  
  
  
  Check Existing Simulations:
  
  If you believe a simulation should be open, check the list of active simulations. You can do this by navigating to the simulation management area in APO.
  Ensure that the simulation you are trying to access is indeed active.
  
  
  
  Review Authorizations:
  
  If you suspect that authorization issues might be causing the problem, check with your SAP security team to ensure that you have the necessary permissions to create and manage simulations.
  
  
  
  Consult Documentation:
  
  Refer to the SAP Help Portal or your organization's internal documentation for specific instructions on managing simulations in APO.
  
  
  
  Contact Support:
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting SAP Notes for any known issues related to this error message.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in APO, such as /SAPAPO/SDP94 for demand planning or /SAPAPO/SNP94 for supply network planning, where simulations are commonly used.
  SAP Notes: Check for any SAP Notes that might address this specific error or provide additional troubleshooting steps.
  User Training: Ensure that users are trained on how to properly create and manage simulations in APO to avoid this error in the future.
  
  By following these steps, you should be able to resolve the error message and continue with your planning activities in SAP APO.