How To Fix GW740 - No host name in the router string

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 740

• Message text: No host name in the router string

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 GW740 - No host name in the router string ?

  The SAP error message GW740: No host name in the router string typically occurs when there is an issue with the configuration of the SAP system's communication settings, particularly related to the gateway or router string used for connecting to other systems or services.
  Cause:
  
  Missing Hostname: The router string in the SAP system configuration does not contain a valid hostname or IP address. This can happen if the configuration was not set up correctly or if the hostname was removed or changed.
  Incorrect Configuration: The SAP system may have an incorrect or incomplete configuration in the instance profile or in the SAP GUI settings.
  Network Issues: There may be underlying network issues that prevent the system from resolving the hostname.
  Environment Variables: The environment variables related to the SAP system may not be set correctly, leading to issues in hostname resolution.
  
  Solution:
  
  
  Check Router String:
  
  Go to the SAP GUI and check the configuration of the router string. You can find this in the instance profile or in the SAP GUI connection settings.
  The router string should be in the format: :hostname:port or :ip_address:port. Ensure that the hostname or IP address is correctly specified.
  
  
  
  Update Instance Profile:
  
  If you have access to the instance profile, check the parameters related to the gateway and router settings. You can do this using transaction code RZ10 to edit the profile.
  Look for parameters like gw/host and gw/service and ensure they are correctly set.
  
  
  
  Check Network Configuration:
  
  Ensure that the hostname can be resolved correctly. You can use commands like ping or nslookup from the command line to verify that the hostname is reachable.
  If the hostname is not resolving, check your DNS settings or the /etc/hosts file (on Unix/Linux systems) to ensure that the hostname is correctly mapped to an IP address.
  
  
  
  Review Environment Variables:
  
  Check the environment variables related to the SAP system, especially those that pertain to the gateway and network settings. Ensure they are set correctly.
  
  
  
  Restart the SAP System:
  
  After making changes to the configuration, it may be necessary to restart the SAP system or the relevant services to apply the changes.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error. SAP frequently updates its knowledge base with solutions for common issues.
  Documentation: Refer to the official SAP documentation for detailed information on configuring the SAP gateway and router settings.
  Support: If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.
  
  By following these steps, you should be able to resolve the GW740 error and ensure that your SAP system can communicate properly with other systems.