How To Fix CLB2034 - Host not found for Gateway destination &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB2 - SAIL: Common messages

• Message number: 034

• Message text: Host not found for Gateway destination &1

What causes this issue?

For Gateway destination &V1&, the host and port could not be determined.

System Response

The processing is aborted.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Check if the Gateway hub server as indicated by the RFC destination &V1&
is up and running.
If so, run transaction SICF to check the default proxy host and port
settings at the Gateway hub server.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB2034 - Host not found for Gateway destination &1 ?

  The SAP error message CLB2034: Host not found for Gateway destination &1 typically indicates that the SAP system is unable to resolve the hostname for the specified gateway destination. This can occur in various scenarios, such as when trying to connect to an external system or service.
  Causes:
  
  Incorrect Hostname: The hostname specified in the gateway destination configuration may be incorrect or misspelled.
  DNS Issues: The DNS server may not be able to resolve the hostname to an IP address.
  Network Issues: There may be network connectivity issues preventing the SAP system from reaching the specified host.
  Gateway Configuration: The gateway destination may not be properly configured in the SAP system.
  Firewall Restrictions: A firewall may be blocking access to the specified host.
  
  Solutions:
  
  
  Check Hostname:
  
  Verify that the hostname specified in the gateway destination is correct. You can check this in transaction SM59 (RFC Destinations).
  Ensure that there are no typos or incorrect entries.
  
  
  
  Test DNS Resolution:
  
  Use command-line tools (like ping or nslookup) from the server where SAP is running to check if the hostname can be resolved to an IP address.
  If the hostname cannot be resolved, you may need to update the DNS settings or add the hostname to the local hosts file.
  
  
  
  Check Network Connectivity:
  
  Ensure that there are no network issues preventing the SAP system from reaching the specified host. You can use tools like ping or traceroute to diagnose connectivity issues.
  
  
  
  Review Gateway Configuration:
  
  In transaction SM59, check the configuration of the gateway destination. Ensure that all parameters are set correctly, including the target host and service.
  
  
  
  Firewall Settings:
  
  Check if there are any firewall rules that might be blocking access to the specified host. Ensure that the necessary ports are open for communication.
  
  
  
  SAP Notes and Documentation:
  
  Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction SM59: This transaction is used to manage RFC destinations in SAP. You can view and edit the configuration of the gateway destination that is causing the error.
  Transaction ST22: This transaction can be used to check for any dumps that might provide additional context about the error.
  SAP Community and Support: If the issue persists, consider reaching out to the SAP Community or SAP Support for further assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the CLB2034 error message in your SAP system.