Windows Installation Instructions

Windows Specific Download Instructions

Go to the ProB Downloads site


Install Tcl/Tk 8.5

If Tcl/Tk 8.5 is already installed you can skip this step.

  • Click on the "Tcl/Tk 8.5 for Windows," link provided in the "Dependencies" column and the "Windows" row above
  • Choose the most recent Tcl/Tk 8.5 distribution available for windows; be sure to choose a version matching ProB, e.g. a 32-bit version (the file highlighted in blue below) if you want to use the 32-bit version of ProB.
  • Download and follow the installation instructions

Install Java

If Java 7 or newer is already installed you can skip this step.

Download the ProB for Windows Zipfile

  • Click on the "Zipfile (with probcli)" link in the Download column and Windows row
  • Decompress and expand the ProB directory if necessary. Do not change the location and structure of the files and directories within ProB (apart from the Machines directory)! The contents of the ProB directory should look something like this:

The subfolder called "Microsoft.VC80.CRT" contains the DLLs for the Microsoft C runtime.

Optionally Download GraphViz

Start ProB

  • Start ProB by double-clicking on the ProBWin icon above
  • Try to open some of the examples provided in the Examples folder shown above
  • Contact us if you have problems


  • Java: be sure to have Java 1.7 or newer installed. Otherwise you will not be able to parse your own classical B machines as our parser is written in Java.
  • Tcl/Tk: be sure to have a matching version of TclTk 8.5 installed
  • Try starting ProBWin or probcli from the Windows Command Prompt; the error messages may help you or us uncover the problem
  • You can also try and obtain information from the main Windows Event/Error Log, by following these steps:
    • Click Start, and then click Control Panel.
    • Click Performance and Maintenance, then click Administrative Tools, and then double-click Computer Management. Or, open the MMC containing the Event Viewer snap-in.
    • In the console tree, expand Event Viewer, and then click the log that contains the event that you want to view.
    • In the details pane, double-click the event that you want to view.
    • The Event Properties dialog box containing header information and a description of the event is displayed.