How To Fix CNVMBTRFC034 - Could not determine host name &1 from IP number &2.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 034

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

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBTRFC034 - Could not determine host name &1 from IP number &2. ?

  The SAP error message CNVMBTRFC034 indicates that the system is unable to resolve a hostname from a given IP address. This can occur in various scenarios, particularly when dealing with Remote Function Calls (RFC) or when the system is trying to connect to another server or service.
  Cause:
  
  DNS Resolution Issues: The most common cause is that the DNS server is unable to resolve the IP address to a hostname. This could be due to misconfiguration in the DNS settings or the hostname not being registered in the DNS.
  Hosts File Configuration: If the hostname is not found in the DNS, the system may check the local hosts file (e.g., /etc/hosts on Unix/Linux or C:\Windows\System32\drivers\etc\hosts on Windows). If the entry is missing or incorrect, it can lead to this error.
  Network Issues: There may be network connectivity issues preventing the system from reaching the DNS server or the target host.
  Firewall or Security Settings: Firewalls or security settings may block the necessary traffic for DNS resolution.
  Incorrect IP Address: The IP address provided may be incorrect or not associated with any hostname.
  
  Solution:
  
  
  Check DNS Configuration:
  
  Ensure that the DNS server settings are correctly configured in the SAP system.
  Use tools like nslookup or dig to verify if the hostname can be resolved from the command line.
  
  
  
  Update Hosts File:
  
  If the hostname is not resolvable via DNS, consider adding an entry in the local hosts file with the correct IP address and hostname.
  
  
  
  Network Connectivity:
  
  Verify that there are no network issues preventing access to the DNS server or the target host.
  Check for any network outages or misconfigurations.
  
  
  
  Firewall Settings:
  
  Ensure that firewalls are not blocking DNS queries or traffic to the target host.
  
  
  
  Verify IP Address:
  
  Double-check the IP address being used to ensure it is correct and corresponds to the intended hostname.
  
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes or updates that may address this issue, as there may be specific patches or configurations recommended by SAP.
  
  
  
  Related Information:
  
  SAP Basis Team: If you are unable to resolve the issue, it may be beneficial to involve your SAP Basis team, as they can provide insights into system configurations and network settings.
  Logs and Traces: Review system logs and traces for additional context around the error, which may help in diagnosing the root cause.
  Documentation: Refer to SAP documentation for more details on RFC configurations and network settings.
  
  By following these steps, you should be able to identify and resolve the issue causing the CNVMBTRFC034 error in your SAP system.