Running Locally

Once you have installed VSim successfully as per the instructions given by Installation, you are ready to run the program. This section will detail how to run VSim locally on Windows, Mac, and Linux operating systems.

Running VSim on Windows

You can start VSim in the following ways on Windows:

  • Select the VSim Icon

    • Double-click on the VSim shortcut on your desktop

    • Go to your Start menu, navigate to the Tech-X folder, and click on the VSim icon

  • Run VSim from the Windows Command Line

    • Navigate to the relevant program folder by going to Program Files -> Tech-X -> VSim-12.2 -> Contents -> bin

    • Type in VSimComposer.exe to run the VSim executable and launch the program

  • Open VSim through Windows File Explorer

    • Open Windows File Explorer, either through your start menu, desktop shortcut, or taskbar icon

    • Navigate to C:\Program Files\Tech-X\ VSim-12.2

      • You can either click on the VSimComposer.lnk shortcut in this folder, or…

      • Continue on to Contents –> bin and then double-click on VSimComposer.exe

  • Open VSim using an existing file

    • Open Windows File Explorer

    • Select a file that has a VSim-supported extension (like a .pre, .in, or .sdf, for example). Either…

      • Double-click on the file if its default program is VSimComposer

      • If its default program is not VSimComposer, right-click on the file and select Open with. Go into Program Files -> Tech-X -> VSim-12.2 -> Contents –> bin and select the VSimComposer.exe application file.


There is a known Windows-OpenGL issue when using VSim over a Microsoft Remote Desktop connection where the application window appears blank on some Windows machines with some graphics cards or some drivers. We provide a RemoteVSimComposer.bat script to work around this issue. It disconnects the remote session and starts VSim while disconnected, so that when the user reconnects, VSim works properly. If you see this issue, launch this script by right-clicking on RemoteVSimComposer.bat and choose “Run as administrator”.

Running VSim on Mac

On Mac OS, the methods for starting VSim are:

  • Start from the Applications Folder

    • Click on the VSimComposer icon in the Applications/VSim folder (or in the folder where you have VSim installed)

  • Run VSim from Terminal Window

    • Open a Terminal window

    • Navigate to the folder where VSimComposer is installed, most likely by going to /Applications/VSim-12.2/

    • Start VSim by typing ./ to run the program executable

Running VSim on Linux

For Linux, you can start VSim through the following:

  • Navigate to the folder where the program is installed, for example /user/local/VSim-12.2-Linux64

  • Type in ./ to run the program executable