Ptolemy II 5.0.1
This is not the most recent version of Ptolemy II. The most recent version can be found at

October 10, 2005 - Ptolemy II 5.0.1 is available for download.

July 21, 2005 - Ptolemy II 5.0 is available for download.

Ptolemy II 5.0.1 includes

  • A Dynamic Dataflow (DDF) domain, in which actors are fired in response to available input data.
  • Modeling of Hybrid systems. Hybrid systems are a special case of modal models where finite-state machines (FSMs) are combined with the continuous-time (CT) models to get mixed continuous-time and discrete-event models.
  • Stochastic hybrid systems, which add random behavior to continuous-time models mixed with discrete events.
  • Heterochronous Dataflow (HDF), which is an extension of synchronous dataflow (SDF) that permits dynamically changing production and consumption patterns without sacrificing static scheduling.
Ptolemy II 5.0.1 includes the following changes since Ptolemy II 5.0:
  • Fixed problem with selecting different user styles for parameters.
  • shutdown.bat script removed from a demo directory. For details see Bat/sdwn3 Virus Warning
  • Fixed a problem surround saving in a library. See the Limitations page.
  • Minor documentation updates
  • The Ptolemy II 5.0.1 Release Notes include a list of new features and actors.

    Quick Start Instructions

    Ptolemy II is available in several formats:

    You can browse Ptolemy II and run demonstration applets without downloading the distribution by accessing the web copy.
    The web copy is merely a set of web pages that were created when we untar'd the distribution on the Ptolemy web site.
    To access Ptolemy II via the applets, you can either go directly to the web copy, or go to the Ptolemy II 5.0.1 Applets page for more information.
    Web Start
    Web Start is a tool from Sun that makes installation and updates particularly simple.
    The Web Start installation works best with Windows, but has also been tried under Solaris, Linux and Mac OSX.
    The Web Start installation does not include source, but behaves almost exactly like a standalone installation: you can save models locally, and you need not be connected to the net after the initial installation.
    Note that the Applet web copy and the Web Start installations are different, the web copy is a set of web pages where some of the pages contain applets, and Web Start is a set of jar files that get downloaded to your machine so that you can run Ptolemy II at a later time, even if you are not connected to the network. For details, see the Installation Summary
    To download using Web Start, see the Ptolemy II 5.0.1 Web Start page.
    Windows Installer
    To download a Windows Installer, see the Ptolemy II 5.0.1 Windows Installer page.
    The source distribution requires either the Cygwin tools, Eclipse or some other way of running commands like make.
    After building Ptolemy II from source, start vergil from the command line and follow the tour.
    The source distribution has been compiled and run under Windows, Solaris and Linux.
    If you intend to develop your own actors in Java, then you should download the source distribution.
    To download source, see the Ptolemy II 5.0.1 Source Download page and then follow the installation instructions.


    The table below is a summary that compares and contrasts the various installers.
    Download Format Requirement Platform Size Create your own models? Require net connection at runtime? Custom Actor creation? (download includes sources) Code generator?
    Applets The applets work best with the Java 1.4.2_08 JRE. See also Java 1.4 plugin Windows, Linux, MacOS X, Solaris Initially ~3 Mb No Yes No No
    Web Start Java Web Start Windows, Linux, MacOS X, Solaris ~29.8 Mb Yes Not required, but can get updates if connected No No
    Windows Installer InstallAnywhere, untested on other platforms, 1.4.2_08 Java Runtime Environment optionally downloaded Windows only 58.5 Mb - 85.8 Mb Yes No Yes No
    Source Download JDK1.4.2, Devel. tools like make Windows, Linux, MacOS X, Solaris 27.6 Mb Yes No Yes Yes

    Places to go

  • The "Using Vergil" chapter from the Ptolemy II Design Document
  • Limitations