How To Fix SBLM018 - Server &1 not reached

SAP Error Message - Details

• Message type: E = Error

• Message class: SBLM - Blacklist Monitor: Message Classes

• Message number: 018

• Message text: Server &1 not reached

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 SBLM018 - Server &1 not reached ?

  The SAP error message SBLM018, which states "Server &1 not reached," typically indicates that the SAP system is unable to connect to a specified server. This can occur in various contexts, such as when trying to access a database, a remote server, or during communication between different SAP systems.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP application server and the target server.
  Server Down: The specified server may be down or not running.
  Incorrect Configuration: The server name or IP address may be incorrectly configured in the SAP system.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection to the server.
  DNS Issues: If the server is referenced by a hostname, there may be DNS resolution issues.
  Timeouts: The connection attempt may be timing out due to slow network performance or server overload.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the server is reachable from the SAP application server.
  Ensure that there are no network outages or issues.
  
  
  
  Verify Server Status:
  
  Check if the target server is up and running. If it is down, restart the server or contact the server administrator.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the SAP system (e.g., RFC destinations, database connections) to ensure that the server name or IP address is correct.
  Use transaction SM59 to check and test RFC connections.
  
  
  
  Firewall and Security Settings:
  
  Ensure that any firewalls between the SAP system and the target server allow the necessary traffic.
  Consult with your network/security team to verify that the required ports are open.
  
  
  
  DNS Resolution:
  
  If using a hostname, verify that it resolves correctly to the correct IP address. You can use the nslookup command to check DNS resolution.
  
  
  
  Increase Timeout Settings:
  
  If the connection is timing out, consider increasing the timeout settings in the relevant configuration.
  
  
  
  Check SAP Notes:
  
  Look for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59 (RFC Destinations) for checking and testing connections.
  SICF (HTTP Services) for checking HTTP services if applicable.
  
  
  
  Logs and Traces:
  
  Check the system logs (SM21) and developer traces (ST22) for any additional error messages that may provide more context.
  
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with detailed information about the error and the steps you have already taken.
  
  
  By following these steps, you should be able to diagnose and resolve the SBLM018 error effectively.