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  • Floating License



This section will provide you with step-by-step instructions for installing a floating license of BayesiaLab on your computer.

Account Information

Before you can start the installation, you will need to receive the following two emails below from

BayesiaLab Download & Activation Instructions

Hello _________,

You are now ready to connect to the Bayesia License Server

Please use the following credentials to log in:


  • BLS User Name: _____________ (Case sensitive)


  • BLS Password: ______________ (Case sensitive)

If you have any questions, please feel free to email us anytime at

Best regards,
The Bayesia Team

BayesiaLab Download & Activation Instructions

Hello ___________,

First of all, many thanks for joining the BayesiaLab user community!

You now have access to a BayesiaLab token license, which is tied to the following account name: ______________.

You can now go ahead and start the BayesiaLab installation by downloading the software package via this link: ________________________________________

Please note that you will first need to uninstall any previous version of BayesiaLab, e.g. the trial version, before installing your new version.

Upon launching BayesiaLab, you will be prompted to enter your credentials to start a BayesiaLab session.

There are 5 fields for you to fill in:

  • 1. Host:
  • 2. Port: 2424
  • 3. User Name: See email notification
  • 4. Password: See email notification
  •  5. Account: You can leave this field blank

We sent you your User Name and Password by separate email. In case you can't immediately find this notification in your inbox, please look for an email sent by with subject line: Bayesia License Server Login Information.

If you do not find this email, you can request a new password via this link:

Upon entering your credentials, please click Next to establish the connection with the BayesiaLab License Server, which will start your BayesiaLab session. Please note that you will need a continuous Internet connection for the duration of your BayesiaLab session.

If you cannot connect to the BayesiaLab Server, chances are that your company’s firewall blocks the connection from BayesiaLab to Please ask your IT department for assistance in this regard  (see the BayesiaLab Library for more detailed information).

You will have access to this license until _____________.

As you get started with BayesiaLab, you may want to check out the BayesiaLab Library, which is a wiki-style knowledge repository of the complete BayesiaLab documentation. It also features many tutorials, instructional videos, etc. And, the Library’s FAQ section may already have an answer to some of your questions about Bayesian networks. Beyond these resources, you are always welcome to reach out to us directly via email:

Finally, you may find it useful to join our discussion group on LinkedIn. There, you can connect with many other analysts and scientists who use BayesiaLab for their research. We also post regular updates regarding events in this forum and share news from the Bayesian network community.

Thanks again,
The Bayesia Team

Software Download

Upon clicking the download link, you will see several BayesiaLab versions available for download.

Please note that for Windows there are 32 and 64-bit versions available. Furthermore, the Windows versions can be downloaded with or without the Java Runtime Environment (JRE). If you have JRE already installed on your PC, you may opt for the smaller download.


Upon completion of the download, simply execute the downloaded file. 

 In Windows environments, Administrator rights are required for the installation.

The installer program will first prompt you for the language.

Upon language selection, the BayesiaLab Setup Wizard will start:

Click next to proceed to the License Agreement.

After accepting the agreement, the next screen will prompt you to select an installation directory. 

Windows users can also choose the Start Menu folder, from which BayesiaLab can be started.

The next screen confirms the selections and allows you to start the actual installation process.

Upon completion, the Wizard presents this screen.

This concludes the installation of files, however, you will still need to activate BayesiaLab. To do so, you may wish to launch BayesiaLab straight away, while you have all the credentials at hand.


Upon starting BayesiaLab, you will be prompted to enter your User Name and Password for connecting to the Bayesia License Server.

Please note that the User Name and Password for connecting to the BayesiaLab License Server are different from your download credentials.


For the Floating License to work, BayesiaLab must be able to connect to and remain connected with If you enter your credentials and there is no response from the login window, this mean that BayesiaLab could not connect with the Bayesia License Server (BLS). Please open a web browser and go to and check whether you can access this URL.

If you are able to get the BLS' Login page, but are still unable to get a response from the login window, you most likely have a problem with your Firewall. Please ask your IT administrator to define an outbound rule that will specifically allow BayesiaLab to communicate with the Bayesia License Server at address For instance, if you had BayesiaLab installed in the C:\Program Files\Bayesia directory, your IT administrator would need establish an outbound rule for C:\Program Files\Bayesia\BayesiaLab\jreXXX\bin\javaw.exe (see screenshot below from a Windows Server 2008 installation).

Upon connecting successfully, BayesiaLab will start up.

Under Windows, BayesiaLab's start-up screen is black.

On Mac OS X, BayesiaLab's start-up screen is blue.

If you cannot solve the firewall issue, a workaround consists in using an external, non-corporate Internet connection, e.g. at home, at Starbucks, or using a cellphone as a hotspot, etc., and connect to the BayesiaLab License Server from there without the firewall blocking problem. Then, you could enable the “Borrow Session” option on the second screen when you start up BayesiaLab. Then you can work offline for the duration you have specified.