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How to Upgrade COMSOL Multiphysics® with a CPU License

This guide explains how to upgrade to a new major version of COMSOL Multiphysics® using a CPU-Locked License (CPU), which allows the software to be installed and used on a specific computer. Upgrading with a CPU-Locked License is largely the same as a fresh installation, with a few caveats.

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If you need to update your current installation, rather than upgrade to a new major version, see "How to Update Your Current Version of COMSOL Multiphysics®".

CPU Upgrade Steps

Upgrades on Windows® or macOS, using a CPU-Locked License, are equivalent to performing a fresh installation. On Linux®, there are additional steps required because a local installation of the license manager is required. Regardless of your operating system, you can keep multiple versions of COMSOL Multiphysics® installed on your computer at the same time.

A colored flowchart of the CPU-Locked upgrade steps per operating system. A colored flowchart of the CPU-Locked upgrade steps per operating system. A visualization of the differences for Windows®, macOS, and Linux® when upgrading COMSOL Multiphysics® with a CPU-Locked License.

Prepare to Upgrade COMSOL Multiphysics®

Before proceeding to the following parts, confirm you have the latest license file (license.dat), which is sent via email to the designated contact in your organization when a new version is released. If you do not have access to this file, reach out to the person who received the email and ask for the latest license.dat file.

CPU-Locked Upgrades on Windows® and macOS

Use the installer for the new version to complete a fresh installation. See " How to Install a CPU-Locked License (CPU)" for more information.

Note: On Windows® and macOS, no additional setup is required after installation. For Linux®, please review the following section before getting started.

CPU-Locked Upgrades on Linux®

On Linux®, COMSOL Multiphysics® installations rely on a license manager. The license manager must be stopped using the process matching how it was started, as a standard process or as a systemd service. A fresh installation can then proceed.

Stop the License Manager

  1. How was the License Manager Started?
    1. Started as a standard process
      1. Open a terminal and move to the directory containing the old license manager binaries. For a typical installation, the command is:

        cd {COMSOLInstallationDirectory}/license/glnxa64

        Note: Remember to replace {COMSOLInstallationDirectory} with the actual path to your COMSOL installation directory.
      2. Stop the license manager by running the command:

        ./lmdown -c ../license.dat

        Note: Adjust the path to license.dat if your old license file is not located one directory level up from the binaries.
    2. Started as a systemd Service (often named lmcomsol)
      1. Open a terminal and use the systemctl command:

        systemctl stop lmcomsol

Run the Installer on Linux®

  1. Choose New COMSOL Installation and enter your license information on the license page.
  2. Select the license manager and COMSOL Multiphysics® (default product selections).
  3. Install your selected products.
See "How to Install a Named Single-User License (NSL)" for guidance on fresh installations.

After Closing the Installer on Linux®

  1. Verify that the license manager is running by referring to "How to Start the License Manager for COMSOL Multiphysics®".

You may begin using COMSOL Multiphysics® when the software is communicating with the license manager.

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