When using the Set command to change the value of a class at runtime, the game instance will crash with an access violation.
Note: This needs to be done in Standalone or a packaged version for this console command to work.
1. Create a new blank C++ project
2. Add a new class based off Actor and name it MyActor
3. In the .h file, add the following line on line #23
UPROPERTY(EditAnywhere) int32 MyInt;
4. Compile the project and return to the editor
5. Drag an instance of the custom actor class into the level
6. Start the game in standalone
7. Run the console command "set MyActor MyInt 5"
Result: The game instance crashes
Expected: The variable should be set and the game should continue as usual.
Access violation - code c0000005 (first/second chance not available) UE4Editor_Engine!AActor::PreEditChange() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\actoreditor.cpp:31] UE4Editor_CoreUObject!GlobalSetProperty() [d:\matthew.clark_main_stream\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:305] UE4Editor_CoreUObject!PerformSetCommand() [d:\matthew.clark_main_stream\engine\source\runtime\coreuobject\private\uobject\obj.cpp:2373] UE4Editor_CoreUObject!StaticExec() [d:\matthew.clark_main_stream\engine\source\runtime\coreuobject\private\uobject\obj.cpp:2883] UE4Editor_Engine!UEngine::Exec() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\unrealengine.cpp:2303] UE4Editor_Engine!UGameEngine::Exec() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\gameengine.cpp:730] UE4Editor_Engine!UGameViewportClient::Exec() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\gameviewportclient.cpp:2137] UE4Editor_Engine!ULocalPlayer::Exec() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\localplayer.cpp:1373] UE4Editor_Engine!UPlayer::ConsoleCommand() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\player.cpp:53] UE4Editor_Engine!APlayerController::ConsoleCommand() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\playercontroller.cpp:363] UE4Editor_Engine!UConsole::ConsoleCommand() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\userinterface\console.cpp:460] UE4Editor_Engine!UConsole::InputKey_InputLine() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\userinterface\console.cpp:716] UE4Editor_Engine!UConsole::InputKey() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\userinterface\console.cpp:1129] UE4Editor_Engine!UGameViewportClient::InputKey() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\gameviewportclient.cpp:342] UE4Editor_Engine!FSceneViewport::OnKeyUp() [d:\matthew.clark_main_stream\engine\source\runtime\engine\private\slate\sceneviewport.cpp:772] UE4Editor_Slate!SViewport::OnKeyUp() [d:\matthew.clark_main_stream\engine\source\runtime\slate\private\widgets\sviewport.cpp:215] UE4Editor_Slate!<lambda_5def90dcf3eca1df5e5b7938a921cb28>::operator()() [d:\matthew.clark_main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4143] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_5def90dcf3eca1df5e5b7938a921cb28> >() [d:\matthew.clark_main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:214] UE4Editor_Slate!FEventRouter::RouteAlongFocusPath<FEventRouter::FBubblePolicy,<lambda_5def90dcf3eca1df5e5b7938a921cb28>,FKeyEvent>() [d:\matthew.clark_main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:196] UE4Editor_Slate!FSlateApplication::ProcessKeyUpEvent() [d:\matthew.clark_main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4144] UE4Editor_Slate!FSlateApplication::OnKeyUp() [d:\matthew.clark_main_stream\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4112] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:1328] UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:1709] UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:707] UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\windows\windowsapplication.cpp:629] user32 user32 UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\matthew.clark_main_stream\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:884] UE4Editor!FEngineLoop::Tick() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\launchengineloop.cpp:2594] UE4Editor!GuardedMain() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\launch.cpp:142] UE4Editor!GuardedMainWrapper() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor!WinMain() [d:\matthew.clark_main_stream\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
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| 0 |
| Component | UE - Gameplay |
|---|---|
| Affects Versions | 4.10, 4.11 |
| Target Fix | 4.11 |
| Created | Dec 9, 2015 |
|---|---|
| Resolved | Jan 4, 2016 |
| Updated | Apr 27, 2018 |