# Assertion failed on preview actor **URL:** \ **Category:** Programming & Scripting\ **Tags:** unreal-engine\ **Created:** [February 18, 2015, 7:42am UTC](https://forums.unrealengine.com/t/assertion-failed-on-preview-actor/307293 "2015-02-18T07:42:13Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![anonymous\_user\_cf68f6301](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_cf68f6301](https://forums.unrealengine.com/u/anonymous_user_cf68f6301)\ **Post date:** [February 18, 2015, 7:42am UTC](https://forums.unrealengine.com/t/assertion-failed-on-preview-actor/307293/1 "2015-02-18T07:42:13Z")
Hi people sorry i didn’t know where you post this, After reading the README and getting it loaded up. however i can load the project under UE 4.7 preview 8 although when i play the project, the error message comes up as… Assertion failed: IsValid() [File:G:\UT4\UnrealTournament-master\UnrealTournament\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 658] KERNELBASE.dll!UnknownFunction (0x000007fefd6a9e5d) + 0 bytes [UnknownFile:0] UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() (0x000007feedb47d64) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95] UE4Editor-Core.dll!FOutputDevice::Logf\_\_VA() (0x000007feed9c78f8) + 159 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\core\private\misc\outputdevice.cpp:144] UE4Editor-Core.dll!FDebug::AssertFailed() (0x000007feed9a8b67) + 62 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\core\private\misc\outputdevice.cpp:224] UE4Editor-UnrealTournament.dll!UUTLocalPlayer::UpdatePresence() (0x000007fedefac22e) + 59 bytes [g:\ut4\unrealtournament-master\unrealtournament\unrealtournament\source\unrealtournament\private\utlocalplayer.cpp:1326] UE4Editor-UnrealTournament.dll!AUTBasePlayerController::ClientSetPresence\_Implementation() (0x000007fedee3125f) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\unrealtournament\source\unrealtournament\private\utbaseplayercontroller.cpp:249] UE4Editor-UnrealTournament.dll!AUTBasePlayerController::execClientSetPresence() (0x000007fededf65dc) + 460 bytes [g:\ut4\unrealtournament-master\unrealtournament\unrealtournament\source\unrealtournament\public\utbaseplayercontroller.h:10] UE4Editor-CoreUObject.dll!UFunction::Invoke() (0x000007fef1621f64) + 15 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\coreuobject\private\uobject\class.cpp:3684] UE4Editor-CoreUObject.dll!UObject::ProcessEvent() (0x000007fef170e95b) + 32 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:920] UE4Editor-Engine.dll!AActor::ProcessEvent() (0x000007fee2ee56d3) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\engine\private\actor.cpp:529] UE4Editor-UnrealTournament.dll!AUTBasePlayerController::ClientSetPresence() (0x000007fedf351839) + 58 bytes [g:\ut4\unrealtournament-master\unrealtournament\unrealtournament\intermediate\build\win64\inc\unrealtournament\unrealtournament.generated.1.cpp:1445] UE4Editor-UnrealTournament.dll!AUTGameMode::UpdatePlayersPresence() (0x000007fedef13b3a) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\unrealtournament\source\unrealtournament\private\utgamemode.cpp:2640] UE4Editor-Engine.dll!AGameMode::PostLogin() (0x000007fee30df500) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\engine\private\gamemode.cpp:251] UE4Editor-UnrealTournament.dll!AUTGameMode::PostLogin() (0x000007fedef0f287) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\unrealtournament\source\unrealtournament\private\utgamemode.cpp:2050] UE4Editor-Engine.dll!UWorld::SpawnPlayActor() (0x000007fee326c918) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\engine\private\levelactor.cpp:600] UE4Editor-Engine.dll!ULocalPlayer::SpawnPlayActor() (0x000007fee32f8853) + 51 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\engine\private\localplayer.cpp:241] UE4Editor-Engine.dll!UGameInstance::StartPIEGameInstance() (0x000007fee30f003c) + 44 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\engine\private\gameinstance.cpp:198] UE4Editor-UnrealEd.dll!UEditorEngine::CreatePIEGameInstance() (0x000007fee6d70a14) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\editor\unrealed\private\playlevel.cpp:2861] UE4Editor-UnrealEd.dll!UEditorEngine::PlayInEditor() (0x000007fee6db9410) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\editor\unrealed\private\playlevel.cpp:2212] UE4Editor-UnrealEd.dll!UEditorEngine::StartQueuedPlayMapRequest() (0x000007fee6dd4d83) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\editor\unrealed\private\playlevel.cpp:974] UE4Editor-UnrealEd.dll!UEditorEngine::Tick() (0x000007fee6b0ddc4) + 13 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\editor\unrealed\private\editor.cpp:1226] UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() (0x000007fee6fc8236) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\editor\unrealed\private\unrealedengine.cpp:347] UE4Editor.exe!FEngineLoop::Tick() (0x000000013fe10ca3) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\launch\private\launchengineloop.cpp:2257] UE4Editor.exe!GuardedMain() (0x000000013fe038bc) + 0 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\launch\private\launch.cpp:142] UE4Editor.exe!GuardedMainWrapper() (0x000000013fe0392a) + 5 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor.exe!WinMain() (0x000000013fe12c49) + 17 bytes [g:\ut4\unrealtournament-master\unrealtournament\engine\source\runtime\launch\private\windows\launchwindows.cpp:202] UE4Editor.exe!\_\_tmainCRTStartup() (0x000000013fe13c19) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618] kernel32.dll!UnknownFunction (0x00000000775f652d) + 0 bytes [UnknownFile:0] ntdll.dll!UnknownFunction (0x000000007772c541) + 0 bytes [UnknownFile:0] ntdll.dll!UnknownFunction (0x000000007772c541) + 0 bytes [UnknownFile:0] Any help will be appreciated. Kind Regards ---
**Author:** ![anonymous\_user\_cf68f6301](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_cf68f6301](https://forums.unrealengine.com/u/anonymous_user_cf68f6301)\ **Post date:** [February 18, 2015, 10:13am UTC](https://forums.unrealengine.com/t/assertion-failed-on-preview-actor/307293/2 "2015-02-18T10:13:38Z")
Actually, i spoke to someone on chat the answer to my problem is on this link > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from...