JetBrains Rider 2026.2 Help

Unreal Engine Program Arguments and Environment Variables

You can influence the runtime behavior of your game by adding program arguments and environment variables to run/debug configurations.

  1. Go to Run | Edit Configurations. Alternatively, press Alt+Shift+F10, then 0.

  2. In the Run/Debug Configurations dialog that opens, select a configuration where you want to pass the arguments and add the environment variables.

    Program arguments

  3. Type the arguments in the Optional arguments field. The arguments should be separated with spaces or new lines.

    Click the Expand field icon to expand the text field, so you can view and edit the arguments as a list.

  4. In the Environment variables field, type the variable name and value: <name>=<value>. If you add several variables, they should be separated with semicolons.

    Alternatively, click the Environment variables icon and add the variable name and value to the User environment variables list.

    Adding environment variables

    In the dialog that opens, you can also see the list of available system environment variables. Clear the Include system environment variables checkbox if you don't want to use the system environment variables for the selected configuration.

    You can reference existing variables, including the parent environment variables, using the $VAR$ syntax. Note that such references are case-sensitive: for example, PATH=xxx:$PATH$ for Linux/macOS and Path=xxx;$Path$ for Windows.

Use EzArgs plugin

You can also use the EzArgs plugin that provides a convenient way for passing arguments to C++ run/debug configurations by writing them in a dedicated box on the toolbar.

The specified options are used for the current project and will be attached to the end of the command line arguments set through the project properties when you click Run or Debug the next time.

Enter the arguments in the field or choose recent arguments from the dropdown list.

Set command line arguments with EzArgs

Installation

You can install the EzArgs plugin from the plugin repository (JetBrains Marketplace) or from a local archive file (ZIP or JAR).

Install a plugin from Marketplace

  1. Open settings or press Ctrl+Alt+S in your IDE and then select Plugins.

  2. Click the Marketplace tab and type the plugin name in the search field.

    Type a forward slash / in the search string to see options for filtering and sorting search results. For example, you can add the following options to your search string to list only AI-related plugins and sort them alphabetically by name:

    /tag:AI /sortBy:name

  3. To install the plugin, click Install and restart the IDE if prompted.

To install a specific version, go to the plugin page in JetBrains Marketplace, download and install it as described in Install plugin from disk. For example, you can do it if the most recent version of the plugin is broken.

Install plugin from disk

You can install a plugin from disk if you need a specific plugin version that you have downloaded from JetBrains Marketplace or a plugin provided by a third party. In this case, you install the plugin from a local ZIP or JAR archive.

  1. Download the plugin archive (ZIP or JAR).

  2. Open settings or press Ctrl+Alt+S in your IDE and then select Plugins.

  3. On the Plugins page, click The Settings button Settings and then click Install Plugin from Disk.

    The Plugins settings page with the settings menu open, showing the "Install Plugin from Disk" option.

  4. Select the plugin archive file and click OK.

  5. Click OK to apply the changes and restart the IDE if prompted.

26 May 2024
UnrealLink and RiderLinkDebug Unreal Engine Project