How To Fix /SAPAPO/TS301 - SimSession &1 deleted after opening or closing error

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TS -

• Message number: 301

• Message text: SimSession &1 deleted after opening or closing error

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/TS301 - SimSession &1 deleted after opening or closing error ?

  The SAP error message /SAPAPO/TS301 SimSession &1 deleted after opening or closing typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue with a simulation session. This error indicates that the simulation session identified by &1 has been deleted due to an error that occurred during its opening or closing.
  Causes:
  
  Session Timeout: The simulation session may have timed out due to inactivity.
  Database Locking Issues: There may be database locks that prevent the session from being opened or closed properly.
  User Authorization: The user may not have the necessary authorizations to access or manipulate the simulation session.
  System Configuration Issues: There could be configuration issues in the APO system that affect session management.
  Network Issues: Connectivity problems between the client and the server can lead to session disruptions.
  Data Integrity Issues: Corrupted or inconsistent data in the session can lead to errors during processing.
  
  Solutions:
  
  Check Session Status: Verify if the session is still active or if it has been deleted. You can do this by checking the session management in the APO system.
  Recreate the Session: If the session has been deleted, you may need to recreate it. Ensure that all necessary parameters are correctly set.
  Review Authorizations: Ensure that the user has the appropriate authorizations to access and manage simulation sessions.
  Check for Locks: Use transaction codes like SM12 to check for any locks on the database that may be affecting the session.
  Increase Timeout Settings: If session timeouts are frequent, consider increasing the timeout settings in the system configuration.
  Consult Logs: Check the system logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  Network Stability: Ensure that the network connection between the client and the SAP server is stable and reliable.
  System Configuration Review: Review the configuration settings in the APO system to ensure they are set up correctly.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. You can search for relevant notes in the SAP Support Portal.
  Documentation: Refer to the official SAP documentation for APO to understand the simulation session management better.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.