ERROR

When launching AutoCAD 2024 with Thermal Desktop installed, AutoCAD opens normally and Thermal Desktop appears available. 

However, the AutoCAD becomes unresponsive or crashes when using Thermal Desktop, including:

• Launching AutoCAD through the Thermal Desktop Launcher (for example, when running the Beer Can tutorial)
• Running any Thermal Desktop command inside AutoCAD

TD_Welcome is not responding
If you close the program, you might lose information

Close the program
Wait for the program to respond

Note: In some cases, AutoCAD may close without a clear error popup.

Software & Version

AutoCAD 2024 (v8)
Thermal Desktop 2025 R2

*This example was taken from this version but is not necessarily limited to this version.

Description/Cause

This issue occurs because AutoCAD and Thermal Desktop are using incompatible system files, which causes a conflict when Thermal Desktop is used within AutoCAD.

As a result, AutoCAD may launch successfully, but it will become unresponsive or crash when attempting to run Thermal Desktop features, such as commands or the Beer Can tutorial.

The cause(s)/solution(s) identified in this documented instance may not be the only possible cause(s)/solution(s).

Solution

Rename conflicting AutoCAD files

1. Ensure Ansys applications and AutoCAD are closed.
2. Navigate to the following folder: C:\Program Files\Autodesk\AutoCAD 20xx (Replace the xx for the autocad version installed)
3. Locate these files: 
   1. libcrypto-3-x64.dll
   2. libssl-3-x64.dll
4. Rename the files as follow:
   1. libcrypto-3-x64.dll → libcrypto-3-x64_AC20xx.dll (Replace the xx for the autocad version installed)
   2. libssl-3-x64.dll → libssl-3-x64_AC20xx.dll (Replace the xx for the autocad version installed)
5. Launch AutoCAD again
6. Open a drawing and test a Thermal Desktop command