How To Fix GW498 - Unable to determine host from address; error with NiAddrToHost

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 498

• Message text: Unable to determine host from address; error with NiAddrToHost

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 GW498 - Unable to determine host from address; error with NiAddrToHost ?

  The SAP error message GW498: Unable to determine host from address; error with NiAddrToHost typically indicates that the SAP system is having trouble resolving a hostname or IP address to a valid host. This can occur in various scenarios, such as when trying to connect to a remote system or when there are issues with network configuration.
  Causes:
  
  DNS Resolution Issues: The system may not be able to resolve the hostname due to DNS misconfiguration or unavailability.
  Incorrect Hostname/IP Address: The hostname or IP address specified in the configuration may be incorrect or not reachable.
  Network Connectivity Problems: There may be network issues preventing the SAP system from reaching the specified host.
  Firewall Restrictions: Firewalls may be blocking the connection to the specified host.
  SAP Gateway Configuration: The SAP Gateway may not be properly configured to handle the request.
  
  Solutions:
  
  
  Check Hostname/IP Address:
  
  Verify that the hostname or IP address you are trying to connect to is correct.
  Use the command line to ping the hostname or IP address to check connectivity.
  
  
  
  DNS Configuration:
  
  Ensure that the DNS server settings are correct and that the DNS server is reachable.
  You can test DNS resolution using commands like nslookup or dig to see if the hostname resolves correctly.
  
  
  
  Network Connectivity:
  
  Check the network connection between the SAP system and the target host.
  Use tools like traceroute to identify where the connection might be failing.
  
  
  
  Firewall Settings:
  
  Review firewall settings on both the SAP system and the target host to ensure that the necessary ports are open for communication.
  
  
  
  SAP Gateway Configuration:
  
  Check the SAP Gateway configuration in transaction SMGW to ensure it is set up correctly.
  Review the gateway logs for any additional error messages that might provide more context.
  
  
  
  SAP Notes and Support:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error.
  If the issue persists, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SMGW (Gateway Monitor) and SM21 (System Log) to gather more information about the error.
  Network Configuration: Review the network configuration settings in the SAP system, including the hosts file if applicable.
  System Logs: Check system logs for any additional error messages that may provide more context about the issue.
  
  By following these steps, you should be able to diagnose and resolve the GW498 error in your SAP system.