How To Fix CNVMBTRFC035 - Could not determine IP number %1 from host name &2.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBTRFC - Messages used in RFC Management and its objects

• Message number: 035

• Message text: Could not determine IP number %1 from host name &2.

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 CNVMBTRFC035 - Could not determine IP number %1 from host name &2. ?

  The SAP error message CNVMBTRFC035 indicates that the system is unable to resolve the IP address from the given hostname. This typically occurs in scenarios involving Remote Function Calls (RFC) where the system needs to communicate with another SAP system or external service.
  Cause:
  
  DNS Resolution Issues: The hostname provided cannot be resolved to an IP address due to DNS configuration problems.
  Network Configuration: There may be issues with the network configuration, such as incorrect routing or firewall settings that prevent access to the hostname.
  Incorrect Hostname: The hostname specified may be incorrect or misspelled.
  Hosts File: The hostname may not be listed in the local hosts file (e.g., /etc/hosts on Unix/Linux or C:\Windows\System32\drivers\etc\hosts on Windows).
  Network Connectivity: There may be general network connectivity issues between the SAP system and the target host.
  
  Solution:
  
  Check Hostname: Verify that the hostname is correct and properly spelled.
  DNS Configuration: Ensure that the DNS server is correctly configured and reachable. You can test this by using commands like nslookup or ping from the command line to see if the hostname resolves correctly.
  Hosts File: If DNS is not being used, add the hostname and corresponding IP address to the local hosts file on the SAP application server.
  Network Configuration: Check the network settings, including firewalls and routing, to ensure that there are no blocks preventing access to the hostname.
  SAP Configuration: In the SAP system, check the RFC destination settings to ensure that they are correctly configured to point to the right hostname and port.
  Restart Services: Sometimes, restarting the SAP application server or relevant services can help resolve transient issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Network Tools: Use network diagnostic tools (like ping, traceroute, or telnet) to troubleshoot connectivity issues.
  SAP Basis Team: If the issue persists, it may be necessary to involve the SAP Basis team or network administrators to further investigate the network and DNS configurations.
  
  By following these steps, you should be able to identify and resolve the underlying issue causing the CNVMBTRFC035 error.