Unreal Engine

If you are a developer looking to try BugSplat on your local machine, we've created a Plugin to help you get started.

BugSplatโ€™s Unreal Engine integration supports capturing crashes on Windows, macOS, Linux, iOS, Android, Xbox, and PlayStation games. Support for the Nintendo Switch is coming soon. BugSplat also supports both Windows and Linux servers.

There are two options for configuring BugSplat. If you are integrating BugSplat for an organization that uses a dedicated build machine, please continue reading.

Windows ๐ŸชŸ

You must upload symbol and executable files to create symbolic call stacks on Windows platforms. The easiest way to upload files is to use our symbol-upload command line utility. You can download symbol-upload here.

Symbol Uploads

Add a step to your build pipeline that uploads .exe, .dll, and .pdb files via symbol-upload. We recommend creating an OAuth Client ID/Client Secret pair for authentication.

cd {your build folder}
symbol-upload-windows.exe -i {client id} -s {client secret} -b {database} -a {appName} -v {appVersion} -f "*.pdb;*.dll;*.exe"

The appName and appVersion parameters will be associated with your uploaded symbols, allowing logical grouping of files within BugSplat for easier symbol management. BugSplat will automatically remove symbol stores that have not been accessed recently. See our FAQ for a description of these rules.

Packaging Settings

Package your game, and check the Include Crash Reporter and Include Debug Files options are selected in your build configuration:

Configuring Crash Report Client

Sending crash reports to BugSplat can be done via a simple configuration change to Unreal Engine's CrashReportClient.

There are two options for configuring CrashReportClient. The first option is modifying the DefaultEngine.ini file for an engine install or source build. Modifying the engine's config file is the easiest approach but has the downside of affecting every game you build with this version. Alternatively, you can add DefaultEngine.ini to a specific path in your packaged build directory, which will overwrite values specified by the engine.

Option 1: Editor and Engine Crashes

Unreal Editor can also be configured to send crash reports to BugSplat. To do this, add the following DefaultEngine.ini file in C:\Path\To\Engine_Install_or_Source_Checkout\Programs\CrashReportClient\Config\DefaultEngine.ini.


Option 2: Packaged Builds

To configure crash uploads to your BugSplat database, create a file named DefaultEngine.ini with the following contents:


Replace {database}, {appName}, and {appVersion} with the names of your BugSplat database, application name, and version. The appName and appVersion parameters will be assigned to each crash report posted to your database, allowing you to group and filter crashes within BugSplat. These parameters should match the corresponding values used for SendPdbs.

Be sure to URL encode spaces and special characters in {appName} or {appVersion}

Unreal Engine 4.25 and older

For capturing crashes in packaged games in Unreal Engine 4.25 and earlier, copy DefaultEngine.ini to {{output directory}}\Engine\Programs\CrashReportClient\Config\NoRedist making sure to create folders that don't exist (where{{output directory}} is the location of your packaged build).

Unreal Engine 4.26 and newer

For capturing crashes in packaged games in Unreal Engine 4.26 and newer, copyDefaultEngine.ini to {{output directory}}\Engine\Restricted\NoRedist\Programs\CrashReportClient\Config making sure to create folders that don't exist (where{{output directory}} is the location of your packaged build).

If DefaultEngine.ini already exists, add the snippet above anywhere in the file. There are multiple DefaultEngine.ini files in your tree. Ensure you edit the right DefaultEngine.ini file; otherwise, crash reports will not be sent to BugSplat.

Trigger a Crash

Run your game. For testing, a crash can be forced from the console using the command "debug crash". After posting the crash report, log in to BugSplat to view the report.

Optional: Customize Crash Report Client

The default CrashReportClient contains text explaining to the user that the crash reports are being sent to Epic. However, by overwriting the CrashReportClient configuration settings, crash reports are instead sent to BugSplat. It is a good idea to change the text and rebuild CrashReportClient. Customizing CrashReportClient requires rebuilding the engine source.

Please see our blog for more information on how to customize Unreal's CrashReportClient.

Linux Servers ๐Ÿง

Special instructions for Linux servers:

  • Package the crash reporter with your Linux server build by adding the -CrashReporter flag to PackageBuildLinuxServer.bat

  • Force a test crash by running your server executable with the option -ExecCmds="debug crash"

Symbolic call stacks are resolved if you deploy symbols on your server. This is the typical case. However, if symbols aren't available locally, upload the Unreal Linux custom symbol files (.psym extension) using symbol-upload.

iOS ๐ŸŽ

You will need to configure bugsplat-ios to capture iOS crash reports. Additionally, you'll need to upload .dSYM files for function names and line numbers to be included in crash reports. Symbol files can be uploaded automatically by invoking symbol-upload.

Android ๐Ÿค–

You will need to configure Crashpad to capture Android crash reports. Additionally, you'll need to generate symbol files from your .so files for function names and line numbers to be included in crash reports. Symbol files can be generated and uploaded automatically by invoking symbol-upload with the -m flag.

Licensee Builds ๐Ÿค

Some forks of Unreal (e.g., Oculus) are set up as a "Licensee" build. Regardless of other settings, crash reports won't be sent because of this block of code:

if (BuildSettings::IsLicenseeVersion() && !UD_EDITOR)
    // do not send unattended reports in licensees' builds except for the editor, where it is governed
    bSendUnattendedBugReports = false;
    bAgreeToCrashUpload = false;
    bSendUsageData = false;

To upload crash reports to BugSplat, recompile with bSendUnattendedBugReports = true.

Custom Fields ๐Ÿ“

We extract metadata from the CrashContext.runtime-xml file attached to Unreal Engine crash reports and convert those values into crash attributes that can be displayed in the web application. Customers can add their own data to this file by creating a custom Unreal Engine build. See the Epic crash reporter documentation for information on adding additional data.

The following XML fields, if created as child properties of RuntimeProperties,can be used to set the BugSplat crash Notes and Key fields

XML Tag NameDescription


Sets the value of the crash Notes field


Sets the value of the crash Key field

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