How To Fix RSTT0084 - Check instance not connected

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTT0 - Trace Tool: Message Class Engine Layer

• Message number: 084

• Message text: Check instance not connected

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 RSTT0084 - Check instance not connected ?

  The SAP error message RSTT0084, which states "Check instance not connected," typically occurs in the context of the SAP system's performance monitoring and tracing tools, particularly when using the SAP Transaction ST05 (SQL Trace) or ST12 (Performance Trace). This error indicates that the system is unable to connect to the specified instance for tracing or monitoring purposes.
  Causes:
  
  Instance Not Running: The SAP instance you are trying to connect to may not be running or may have been stopped.
  Network Issues: There could be network connectivity issues between the client and the SAP instance.
  Configuration Issues: The instance may not be properly configured in the SAP system or in the client settings.
  Authorization Issues: The user may not have the necessary authorizations to access the instance.
  Incorrect Instance Name: The instance name or number specified may be incorrect.
  
  Solutions:
  
  
  Check Instance Status:
  
  Use the SAP Management Console (SAP MMC) or transaction SM51 to check if the instance is running. If it is not, start the instance.
  
  
  
  Verify Network Connectivity:
  
  Ensure that there are no network issues preventing access to the instance. You can use tools like ping or telnet to check connectivity.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the SAP system to ensure that the instance is correctly defined. This includes checking the instance profile and SAP GUI settings.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to access the instance. You may need to consult with your SAP security team to verify this.
  
  
  
  Correct Instance Name:
  
  Double-check the instance name or number you are trying to connect to. Make sure it matches the actual instance configuration.
  
  
  
  Restart the SAP System:
  
  If the issue persists, consider restarting the SAP system or the specific instance to resolve any temporary issues.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM51 (to view active instances), ST05 (SQL Trace), and ST12 (Performance Trace).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Logs: Review the system logs (transaction SM21) for any related error messages that could provide more context on the issue.
  
  If the problem continues after trying the above solutions, it may be beneficial to consult with SAP support or your internal SAP Basis team for further assistance.