How To Fix RT671 - Unknown host; last test : &4

RT671 - Overview

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 671

• Message text: Unknown host; last test : &4

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 RT671 - Unknown host; last test : &4 ?

  The SAP error message RT671 "Unknown host; last test: &4" typically indicates that the SAP system is unable to resolve the hostname of a server or service that it is trying to connect to. This can occur in various scenarios, such as when trying to connect to a database, an application server, or any other network resource.
  Causes:
  
  DNS Issues: The hostname cannot be resolved due to DNS configuration problems.
  Network Configuration: The network settings on the SAP server may not be correctly configured, preventing it from reaching the specified host.
  Incorrect Hostname: The hostname specified in the configuration may be incorrect or misspelled.
  Firewall Restrictions: A firewall may be blocking access to the host.
  Host Unavailability: The target host may be down or not reachable due to network issues.
  
  Solutions:
  
  Check Hostname: Verify that the hostname is correct. You can do this by pinging the hostname from the command line of the SAP server.ping <hostname>
  
  DNS Configuration: Ensure