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.
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.
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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
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