How To Fix 00497 - Unable to determine host address: NiHostToAddr failed

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 497

• Message text: Unable to determine host address: NiHostToAddr failed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00497 - Unable to determine host address: NiHostToAddr failed ?

  The SAP error message "00497 Unable to determine host address: NiHostToAddr failed" typically indicates that the SAP system is having trouble resolving the hostname of the application server or the database server. This can occur due to various reasons, including network configuration issues, DNS problems, or incorrect settings in the SAP system.
  Causes:
  
  DNS Resolution Issues: The hostname cannot be resolved to an IP address due to DNS misconfiguration or the DNS server being unreachable.
  Incorrect Hostname: The hostname specified in the SAP configuration might be incorrect or misspelled.
  Network Configuration: There may be network issues preventing the SAP system from reaching the DNS server or the specified host.
  Hosts File Configuration: The /etc/hosts file (on Unix/Linux) or C:\Windows\System32\drivers\etc\hosts file (on Windows) may not contain the correct mappings for the hostname.
  Firewall or Security Settings: Firewalls or security settings may be blocking access to the hostname or DNS server.
  
  Solutions:
  
  Check Hostname: Verify that the hostname specified in the SAP configuration is correct. You can do this by checking the instance profile or the SAP GUI settings.
  DNS Configuration: Ensure that the DNS server is correctly configured and reachable. You can test this by using commands like nslookup or ping to see if the hostname resolves correctly.
  Update Hosts File: If DNS is not being used or is unreliable, consider adding the hostname and its corresponding IP address to the /etc/hosts or hosts file.
  Network Connectivity: Check the network connectivity between the SAP server and the DNS server. Ensure that there are no network issues or outages.
  Firewall Settings: Review firewall settings to ensure that they are not blocking DNS queries or access to the specified host.
  SAP Profile Parameters: Check the SAP profile parameters related to network settings, such as rdisp/mshost, rdisp/msserv, and rdisp/trace, to ensure they are correctly configured.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. SAP frequently releases notes that address known issues.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues and solutions shared by other users.
  Logs: Review the SAP system logs (transaction SM21) and developer traces (transaction ST11) for additional error messages or context that may help diagnose the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the "00497 Unable to determine host address: NiHostToAddr failed" error in your SAP system.