Installation on Windows

Here are described the main steps for installing and licensing LocalSolver on your computer. LocalSolver is implemented in C++ language. The software can be used either as a standalone executable or as a callable library (Python, C++, Java, .NET). Please check that your computer meets the minimum system requirements before installing the software.

System requirements

  • Architectures: x86, x64. Note that x64 version offers full 64-bit capabilities.
  • Operating systems: Windows XP (or superior: 10, 8, 7, Vista, Server 2008, Server 2003).
  • For the C++ library: Visual Studio 2010 (or superior).
  • For the Java library: Java Development Kit 5.0 with J2SE Runtime Environment 5.0 (or superior).
  • For the .NET library: .NET Framework 2.0 (or superior).
  • For the Python library: Python 2.7, Python 3.5 or Python 3.6. The python libraries are linked against the binaries provided by the official installers available on the python website. The use of third-party python distributions is not supported.


Before anything else, please close all your opened terminals and IDE. You must have administrator rights on your computer to install LocalSolver. If you haven’t done so yet, download LocalSolver for Windows from the LocalSolver website.

Then, launch LocalSolver_XXXX.exe and follow the given instructions. LocalSolver will be installed for all users.


Click on next to start the installation.


Accept the terms of the agreement to continue the installation.

During the installation, you will be prompted to select your License file. If you already have a license, you can select it at this step and skip the licensing part of this documentation. You can change your license at any time by following the procedures described in this guide.


Select your license file or continue without license.

Choose the install location of LocalSolver and click Install to start the installation. Note that you can install different versions of LocalSolver on your system but only the last installed version will be easily accessible from the command line. To use the previous ones, you have to use their exact path (eg. C:\localsolver_4_5\bin\localsolver). Except that, all versions of LocalSolver can work together without any trouble.


Choose the install location of LocalSolver.

If you have not specified any license when asked, a page with your hardware signature will appear at the end of the installation. You will have to give us this hexadecimal number if you want to apply for a free trial license or a free academic license on our website.


Hardware signature. It is generated only if you have not specified any license.

Licensing for: Free Trial, Free Academic, Desktop or Server licenses


If you don’t have your license yet, please go on our website to register and request a free academic license or a free trial license. As licenses are manually delivered by a member of the LocalSolver team, the whole procedure can take a few days to complete (usually 1 day).

You simply have to put the correct license file in the installation folder of LocalSolver. For that:

  1. Go on LocalSolver website, login on your account and download your license file.
  2. Copy the file license.dat downloaded from your account in C:\localsolver_XXX\.

Licensing for: Floating or Site licenses

This procedure applies only if you bought a floating or an academic network licence. You have to setup a token server and then license each client machine as follows.

For the token server

  1. Go to your account and download the license file of the token server.
  2. Copy the file license.dat downloaded from your account in C:\localsolver_XXX\.
  3. Launch lstokenserver.exe in C:\localsolver_XXX\bin. You need administrator privileges to run this application. This program installs and automatically starts the token server as a Windows Service.

For each client machine

Create a new file and write the following line with the IP of the token server:


Save it in C:\localsolver_XXX\license.dat.


The token server listen on TCP port 7462. Normally, LocalSolver will automatically add the required exceptions to the windows firewall. If you use an another software as firewall or if you have dedicated hardware to ensure your network security, please ask your system administrator to add the required rules to allow the trafic between the lstokenserver service and your applications.


Open a terminal in folder examples\toy and enter the following line:

C:\localsolver_5_5>localsolver examples\toy\toy.lsp lsTimeLimit=1

If no error occurs, you are ready to use LocalSolver and solve your first model.


You must have administrator rights on your computer to uninstall LocalSolver. Then, go in your LocalSolver folder and launch Uninstall.exe.