2. Installing Reactis for C#

Reactis for C is available on Windows[1] XP, Vista, 7 and 10. To run Reactis for C, a system should satisfy the following minimum requirements:

  • At least 1GB RAM (more is required for large programs)

  • At least 60 MB free disk space

  • An installed Ethernet card

The Reactis for C install process differs slightly depending on whether you have purchased a node-locked or floating license. Note, that evaluation licenses are node-locked.

For floating licenses, you (or someone in your organization) will also need to install the Reactis License Manager.

2.1. Installing with a Node-Locked License#

To install Reactis for C, perform the following steps:

  1. Execute the self-installing executable reactis4c-setup-V2022.exe and follow the instructions. You may always download the latest version of the installer from the Reactive Systems web site listed below. Note, that an updated version of the installer will have a name of the form reactis4c-setup-V2022.0.n.exe where n is a patch release number. Download address: https://reactive-systems.com/login.msp

  2. To obtain a Reactis for C license, first find the (incomplete) license file rsilicense.dat. This file can be found in the directory where Reactis for C was installed. The default location for the license file is either: C:\Program Files\Reactis for C V2022\rsilicense.dat

    or, if 32-bit Reactis for C is installed on a 64-bit version of Windows:

    C:\Program Files (x86)\Reactis for C V2022\rsilicense.dat


Fig. 2.1 The Reactis license configuration dialog.#

The location of rsilicense.dat can be found by starting Reactis. When Reactis is started without a license, the full pathname of rsilicense.dat is displayed, as shown by highlighted item 1 in Figure 2.1. Once you have located rsilicense.dat, send a copy to help@reactive-systems.com. You will receive a response containing a completed license as an attachment. When you receive this e-mail, replace the original rsilicense.dat with the completed license.

2.2. Installing with a Floating License#

If your organization already has a server running the Reactis License Manager, then you may install Reactis for C on your computer (the client) as follows. Note that in this case you will need the name or IP address of the server running the license manager; your network or system administrator can supply you with this information.

  1. On the client machine, run the installer as described in Step 1 of “Installing with a Node-Locked License”.

  2. Invoke Reactis for C by selecting Start > Programs > Reactis for C V2022 > Reactis The dialog shown in Figure 2.2 will appear, enabling you to specify the server on which the Reactis License Manager is running. To specify a server, click the Add button and then enter the IP address or name of the server. If your organization has more than one server running the Reactis License Manager, you may enter as many of these as you wish.


Fig. 2.2 Configuring Reactis for C to access a Reactis License Manager running on a remote server.#

2.3. Installing the Reactis License Manager#

See the Reactis License Manager User’s Guide, available at:


2.4. Performing a Silent Install#

The Reactis for C installer supports a silent install (installing Reactis for C from the DOS command line in an automated fashion). The following command line switches control a silent install.

  • /SILENT Instructs the installer to be silent. When the installer is silent the wizard and the background window are not displayed but the installation progress window and error messages are displayed. The default settings (which can be overridden using command line arguments) are used for the install.

  • /VERYSILENT With this switch the installer will display error messages, but not the wizard, background window, or progress window.

  • /NOCANCEL Prevents the user from canceling during the installation process by disabling the Cancel button and ignoring clicks on the close button. This switch is useful in conjunction with /SILENT.

  • /DIR="x:\dirname" Overrides the default directory name displayed on the Select Destination Location wizard page. A fully qualified path name must be specified.

  • /GROUP="folder name" Overrides the default folder name displayed on the Select Start Menu Folder wizard page.

  • /COMPONENTS="comma separated list of component names" Overrides the default components settings. By default all components are installed. Possible components are:


    Reactis for C GUI


    License Manager


    License Monitor


    Help files


    Example files


    Reactis for C API

  • /COPYSETTINGS Instructs the installer to copy the personal settings and license information to the new installation if running in SILENT or VERYSILENT mode and a previous existing Reactis for C installation is found. This is the default.

  • /NOCOPYSETTINGS Do NOT copy personal settings and license information from a previous existing installation.

  • /SAVEINF="x:\filename" Saves information entered during the install in a file. That file can later be used to specify default parameters via LOADINF. The following information is saved:

    • Install directory name

    • Program group name

    • Components

    • Should settings and license information be copied from existing versions of Reactis?

  • /LOADINF="x:\filename" Load default information from a file created with the SAVEINF option. This is useful in combination with a silent install, i.e.

    C:\> reactis4c-setup-V2018.exe /SILENT /LOADINF="mysetup.inf"

    will install Reactis for C without any user prompts using the values saved in mysetup.inf Options given on the command line will override parameters stored in the information file.

  • /HELP or /? or /H Display help information for the silent install command line switches.