The license server should be at the same point version as the keystrings you are serving.
For example, if you are serving 20.5 keystrings, it is ideal to have your license server version at 20.5.

Please check the system requirements to ensure your operating system is supported for Houdini licensing.

To upgrade your Houdini License Server software:

1. Download the latest Production or Daily build of the Houdini version you are looking to install.

2. Run the installer, ensuring to install the License Server component.

   • For Linux you do have the option of installing only the license server sesinetd (sesinetd.install).
   • For Windows and OSX, you must install the full Houdini package.
     Ensure the License Server is checked. This will upgrade the existing sesinetd (sesinetd.exe) program.
     
     

3. During the installation process, the license server component will be automatically restarted. This should take only a minute.
   

The license server software will serve keystrings up to one full version higher.
For example, if you are running a license server at version 16.5, you may serve only up to 17.5 keystrings. You will not be able to serve 18.0.

If you are running a central license server, we do recommend alerting your users that an upgrade will take place. It will be important for them to save their files during this time as a precaution. In general, an upgrade of the license server software will not impact users. The heartbeat is set for approximately 20 minutes. This means that if a client machine is not able to make contact with the central license server in that time, the active Houdini session will close.

The license server program is called sesinetd.