How to Install Comsol Multiphysics 3.5a with a License File
Comsol Multiphysics is a software platform for modeling and simulating physics-based problems. It can be used for various applications such as electromagnetics, fluid dynamics, heat transfer, chemical engineering, and more. To install Comsol Multiphysics 3.5a, you need a license file that contains the information about your purchased products and modules.
In this article, we will show you how to obtain and use a license file to install Comsol Multiphysics 3.5a on your computer.
Obtaining a License File
There are different types of licenses available for Comsol Multiphysics, such as CPU-locked, named single-user, floating network, and academic licenses[^1^]. Depending on your license type, you may need to contact Comsol or your local distributor to request a license file. You can also download a license file from your Comsol Access account if you have one.
A license file is a text file with the extension .rarl that contains the information about your purchased products and modules, as well as the host ID of your computer or license server. The host ID is a unique identifier of your computer or license server that is based on its MAC address or disk serial number.
To find out your host ID, you can use the lmutil utility that is included in the Comsol installation package. You can run lmutil from the command prompt or terminal by typing:
This will display your host ID on the screen. You can also use the -hostname option to display your computer name or the -ipaddress option to display your IP address.
Once you have obtained a license file, you need to save it in a location that is accessible by the Comsol installer. For example, you can save it on your desktop or in a folder on your hard drive.
Installing Comsol Multiphysics 3.5a with a License File
To install Comsol Multiphysics 3.5a with a license file, you need to run the Comsol installer that matches your operating system and follow the instructions on the screen. You can download the installer from the Comsol website or use the installation DVD if you have one.
During the installation process, you will be asked to specify the location of your license file. You can browse to the folder where you saved your license file and select it. The installer will then verify your license file and proceed with the installation.
If you have a floating network license, you need to install the license manager on a separate computer that acts as a license server for your network. You can use the same installer to install the license manager by choosing the option \"Install License Manager Only\". You need to specify the location of your license file and the port number for communication between the license server and clients. The default port number is 1717.
After installing the license manager, you need to start it by running lmgrd.exe (Windows) or lmgrd (Linux and macOS) from the command prompt or terminal. You can also use the lmtools utility (Windows) or lmadmin (Linux and macOS) to configure and manage your license server.
To connect to your license server from Comsol Multiphysics clients, you need to set an environment variable called LM_LICENSE_FILE with the value of @hostname:port, where hostname is the name or IP address of your license server and port is the port number that you specified during installation. For example:
You can set this environment variable in different ways depending on your operating system and preferences. For more details, please refer to the Comsol documentation[^2^].
If you encounter any problems with installing or using Comsol Multiphysics 3.5a with a license file, you can check the following sources for help:
The installation guide that is included in the Comsol installation package or available online[^3^].
The knowledge base articles on the Comsol aa16f39245