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VLE, Virtual Environment Laboratory, is a multimodeling, simulation platform based on the discrete event formalism DEVS (Discrete Event System Specification). VLE provides a set of C++ libraries, the VFL (VLE Foundation Libraries) and a lot of programs like a simulator, a graphical user interface to model and develop models and tools to analyze and visualize simulation outputs. The VFL are sufficiently well designed to allow the development of new simulators, models or new programs for modeling and analysis.

Our goal with VLE is to provide powerful tools for modeling, simulation and analysis and easy to use in complying with the DEVS specification DEVS. and work research that cling to the simulation community. We are also pursuing the objective to develop and maintain a community of users and developers using an open, agile and community oriented development.

  • May 18, 2011: VLE 1.0.0-alpha6
    • Alpha6 release of VLE 1.0: bug fix release
  • April 27, 2011: VLE 1.0.0-alpha5
    • Alpha5 release of VLE 1.0: bug fix and new win32 installation
  • March 11, 2011: VLE 1.0.0-alpha4
    • Alpha4 release of VLE 1.0: bug fix and new win32 an Linux binaries
  • December 8, 2010: VLE 1.0.0-alpha2
    • Alpha2 release of VLE 1.0
  • December 7, 2010: VLE 1.0.0-alpha1
  • October 13, 2010: VLE 0.8.9
    • Bug fix release.
  • September 28, 2010 VLE 0.8.8
    • Bug fix release.
  • July 23, 2010: VLE 0.8.7
    • Bug fix release, new Console oov plug-in and PyVLE.
  • June 29, 2010: VLE 0.8.6
    • Bug fix release.
  • June 18, 2010: VLE 0.8.5
    • Bug fix and new a new Dummy oov plug-in.
  • May 25, 2010: Youtube video for VLE's Git repository
    • VLE project is displayed by Gource as an animated tree with the root directory of the project at its center. Directories appear as branches with files as leaves. Developers can be seen working on the tree at the times they contributed to the project.
  • May 31, 2010: VLE 0.8.4
    • Bug fix in Difference Equation extension and add the possibility to dump, in a valid VPZ file, the structure of a coupled model in a DSDE Executive model.
  • April 28, 2010: VLE 0.8.3
    • New modeling plug-in for the petri net extension, new graph constructor and some bug fix.
  • April 9, 2010: VLE 0.8.2
    • Bug fix release.
  • March 24, 2010: VLE 0.8.1
    • Bug fix release.
  • March 2, 2010: VLE 0.8.0 released
    • Two weeks after the last release candidate, the list of changes being sufficiently short, the activity of the tracker is close to 0, it is the hour to release a final version 0.8. Now, the branch 0.8 becomes the stable version of VLE. We will give up the maintenance of the last branch 0.7 in next weeks. In a few days, we will produce some reports of > \features request on the tracker and the website. Lastly, for the next version of VLE, we return to a shorter development cycle.
  • February 16, 2010: VLE 0.8.0-rc4
    • A bug fix release and some new feature requests.
  • February 9, 2010: VLE 0.8.0-rc3
    • A bug fix release and some new feature requests.
  • February 2, 2010: VLE 0.8.0-rc2
    • A bug fix release.
  • January 24, 2010: VLE 0.8.0-rc1
    • After 11 months of development, we offer a first release candidate for the 0.8 branch of VLE. There are still bugs in the GUI but it is usable. From now, on branch 0.8, we fix bugs and we try to not break API and ABI. Files are available from websites: and
  • January 2010: The VLE web site supports multi-language
    • The use of the multi-language support is quite simple. Just write "/en" as a suffix of the name of the web page if you write in english. You can use other suffix ("/de" for german for instance) to write pages in any usable language.

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