How To Fix 00436 - The host name cannot contain blanks

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 436

• Message text: The host name cannot contain blanks

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00436 - The host name cannot contain blanks ?

  The SAP error message "00436 The host name cannot contain blanks" typically occurs when there is an issue with the configuration of the system, particularly related to the hostname settings. This error indicates that the hostname defined in the system contains spaces or blank characters, which is not allowed.
  Cause:
  
  Invalid Hostname Configuration: The hostname defined in the SAP system or in the network configuration may contain spaces or blank characters.
  Incorrect System Parameters: The parameters set in the SAP profile or instance profile may have been incorrectly configured, leading to the inclusion of spaces in the hostname.
  Network Configuration Issues: The hostname might be incorrectly set in the operating system or DNS settings, which can lead to this error.
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Check Hostname Configuration:
  
  Log in to the operating system where the SAP instance is running.
  Use the command hostname to check the current hostname.
  Ensure that the hostname does not contain any spaces or special characters.
  
  
  
  Modify the Hostname:
  
  If the hostname contains spaces, you will need to change it. You can do this by editing the /etc/hostname file (on Unix/Linux systems) or using the appropriate command in Windows.
  For Unix/Linux, you can use:
  sudo hostnamectl set-hostname new-hostname
  
  Replace new-hostname with a valid hostname that does not contain spaces.
  
  
  
  Update SAP Profile:
  
  Check the instance profile (usually located in the directory /usr/sap/<SID>/SYS/profile/).
  Look for parameters like rdisp/mshost and rdisp/msserv and ensure they do not contain spaces.
  If changes are made, restart the SAP instance for the changes to take effect.
  
  
  
  DNS Configuration:
  
  Ensure that the DNS settings are correctly configured and that the hostname resolves properly without spaces.
  You can test this by using the nslookup or ping command to verify that the hostname resolves correctly.
  
  
  
  Restart SAP Services:
  
  After making the necessary changes, restart the SAP services to ensure that the new hostname is recognized.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to hostname configuration and error messages for additional guidance.
  Documentation: Refer to the SAP Basis Administration Guide for detailed instructions on configuring hostnames and network settings.
  System Logs: Review the system logs (transaction SM21) for any additional errors or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to resolve the "00436 The host name cannot contain blanks" error in your SAP system.