How To Fix RSTT0084 - Check instance not connected

RSTT0084 - Overview

• 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?

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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.