Determining the Current License File Directory Path

This section is applicable to installations involving a license file activation type. This licensing method is gradually being replaced by the user credentials activation type starting with Thermo‑Calc 2025a.

This topic explains how to find out where your license file is installed, either by default or if a different directory was chosen for previously installed versions. For new installations, where you may not have had a license file when you installed Thermo‑Calc, you can also use these instructions to determine the correct file path.

From Thermo‑Calc

If you have already installed Thermo‑Calc, you can view the path to the license file in the GUI. Select Help → Show License Info.

In Console Mode you can run the SYS module command display_license_info.

How do I add or update a standalone (SUNLL) license on a Windows computer where Thermo‑Calc is already installed?

  1. Unpack the .zip file that contains your standalone license and save the LSERVRC file on your computer. Find out where to place the new license file by opening a Command Prompt Window (cmd.exe) and type in the command line:

    >set LSERVRC

  2. Press Enter. The output from the command is the path to the license file (including the name of the license file). For example: if the output is

    LSERVRC=C:\Users\<user>\Documents\Thermo‑Calc\lservrc

    then the new license file should be placed in C:\Program Files\Thermo‑Calc\2025b\

How do I add or update a standalone (SUNLL) license on a Linux computer where Thermo‑Calc is already installed?

Find out where to place the new license file by opening a Terminal window and type in the command line:

echo $LSERVRC

How do I add or update a network license on Windows?

Only the WlAdmin tool can be used to update the network license used by the License Manager. See Install the Thermo‑Calc Network License Using WIAdmin.

How do I add or update a network license on Linux?

Replace your current license file with the new license file. The license file is located in the same directory as the license server.