Software Patches

Thermo-Calc 2026a Patch to Fix Windows Uninstaller and Update Java Version

Released: 30 January 2026

Java Version Update

There was an update in Java, so we recommend all users who have Thermo-Calc version 2026.1.190209-250 install the patch so that they are running the most recent version of Java.

Windows Uninstaller Fix

Additionally, this patch fixes an issue with the Windows uninstaller in which the program left files on your computer after uninstalling the program. The files should not cause any issues but may take up a lot of storage.

Who Should Install the Patch

All users running Thermo-Calc version 2026.1.190209-250.

How to Apply the Patch

1. Check the version number in your software:
   – Windows/Linux: Help menu > About
   – Mac: Thermo-Calc 2026a menu > About Thermo-Calc 2026
2. If you have version 2026.1.190209-250, we recommend you install the patch.
3. From Thermo-Calc, go to the Help menu > Check for Updates.
4. A pop-up window will appear stating that there is an update and asking if you would like to install it. Click Yes.
5. The patch will begin downloading.
6. Once the patch has been downloaded, the installer will automatically open. Follow the prompts to install the patch.
7. Once the installation is complete, click Finish.
8. The patch is now installed, and you can resume using the software.

Thermo-Calc 2025a Additive Manufacturing Module Patch (Windows)

Error message: None of the simulations converged!

Released: 12 February 2025

Users of Thermo-Calc 2025a running the Additive Manufacturing (AM) Module on a Windows computer may encounter a “None of the simulations converged!” error, which prevents AM Module simulations from completing. This is due to a Windows 11 update released in February 2025 that introduced a compatibility issue. A patch is available to resolve this.

If you are running Thermo-Calc 2025a and the AM Module on a Windows computer, and you get this error message, we recommend you apply the patch.

If you apply the patch before Windows 11 is updated, the AM Module will stop working. Therefore, we strongly advise that you only apply the patch if you are experiencing the issues described here.

To apply the patch:

1. Close all Thermo-Calc instances.
2. Click this link to download the patch, called patch_AM_module.  
3. Extract the patch from the zip file.
4. Right-click the downloaded file and select Run as Administrator.
5. A command prompt window will appear and automatically run. When prompted, press any key to continue.
6. Close the command prompt window.
7. Reopen Thermo-Calc and resume using the software.