How To Fix 0S146 - You have already switched on the Enqueue trace

SAP Error Message - Details

• Message type: E = Error

• Message class: 0S - Messages for the SQL trace

• Message number: 146

• Message text: You have already switched on the Enqueue trace

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 0S146 - You have already switched on the Enqueue trace ?

  The SAP error message 0S146 indicates that the enqueue trace has already been activated in the system. This message typically arises when there is an attempt to activate the enqueue trace again while it is already enabled.
  Cause:
  The primary cause of this error is an attempt to switch on the enqueue trace when it is already active. The enqueue trace is a diagnostic tool used in SAP systems to monitor and analyze lock entries and their behavior. It is often used for troubleshooting issues related to data locking and concurrency.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Current Status of the Enqueue Trace:
  
  You can check if the enqueue trace is already active by using transaction code SM12 (Lock Entries) or SM21 (System Log) to see if there are any active traces.
  
  
  
  Deactivate the Enqueue Trace:
  
  If you need to deactivate the trace for any reason, you can do so using transaction SM12 or by executing the appropriate command in the system. The command to deactivate the enqueue trace is typically done through the SAP GUI or via a specific transaction.
  
  
  
  Re-activate the Enqueue Trace:
  
  If you need to re-activate the enqueue trace after deactivating it, you can do so using the same method you initially used to activate it.
  
  
  
  Use Transaction Codes:
  
  You can use transaction RSCONN01 to check the status of the enqueue trace and manage it accordingly.
  
  
  
  Consult Documentation:
  
  If you are unsure about the steps or need more detailed instructions, refer to the SAP Help Portal or your organization's internal documentation regarding system monitoring and tracing.
  
  
  
  Related Information:
  
  Enqueue Trace Purpose: The enqueue trace is primarily used for debugging and performance analysis. It helps in identifying issues related to locks and can be crucial for resolving deadlocks or performance bottlenecks.
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or updates regarding this error message. SAP Notes can often provide solutions or workarounds for specific issues.
  System Administration: If you are not the system administrator, it may be necessary to contact your SAP Basis team for assistance in managing the enqueue trace.
  
  By following these steps, you should be able to resolve the error message 0S146 and manage the enqueue trace effectively.