How To Fix TT378 - Transaction & started in new session

SAP Error Message - Details

• Message type: E = Error

• Message class: TT - Extended Computer Aided Test Tool (eCATT) messages

• Message number: 378

• Message text: Transaction & started in new session

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message TT378 - Transaction & started in new session ?

  The SAP error message TT378, which states "Transaction & started in new session," typically occurs when a user attempts to start a transaction that is already running in another session. This can happen if the user has multiple sessions open and tries to execute the same transaction in a new session.
  Cause:
  
  Multiple Sessions: The user has already initiated the same transaction in another session.
  Session Limitations: Some transactions are designed to allow only one instance to be open at a time.
  User Configuration: The user's settings or the system's configuration may restrict the ability to run multiple instances of the same transaction.
  
  Solution:
  
  
  Check Open Sessions: Review your currently open SAP sessions. You can do this by using the transaction code /nSM04 to see all active sessions for your user ID. If you find the transaction already running, you can either switch to that session or close it if it's not needed.
  
  
  Use the Same Session: Instead of starting a new session, navigate to the existing session where the transaction is already running. You can switch between sessions using the session management options in SAP.
  
  
  Log Off and Log Back In: If you are unable to find the session or if it seems to be stuck, logging off and then logging back into SAP can sometimes resolve session-related issues.
  
  
  Transaction Variants: If you need to run the same transaction with different parameters, consider using transaction variants or different transaction codes if applicable.
  
  
  Consult with SAP Basis Team: If the issue persists or if you believe it is related to system configuration, consult with your SAP Basis team or system administrator for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes that may help you manage sessions, such as /nSM04 (User Sessions) and /nSE38 (ABAP Editor).
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific transaction you are trying to run.
  User Training: Ensure that users are trained on how to manage their sessions effectively to avoid this error in the future.
  
  By following these steps, you should be able to resolve the TT378 error and continue working in SAP without interruption.