Trying to run my games server, get an Assertion Failed error

Below is the log file for the crash, I’m not entirely sure what i’ve done wrong:

Log file open, 12/01/14 16:27:56
LogInit: Version: 4.5.1-0+UE4
LogInit: API Version: 0
LogInit: Compiled (64-bit): Dec  1 2014 15:02:45
LogInit: Compiled with Visual C++: 18.00.31101.00
LogInit: Build Configuration: Development
LogInit: Branch Name: UE4
LogInit: Command line: 
LogInit: Base directory: E:/Unreal Projects/Smashy/Binaries/Win64/
LogInit: Rocket: 0
[2014.12.01-16.27.56:690][  0]LogTaskGraph: Started task graph with 3 named threads and 6 total threads.
[2014.12.01-16.27.56:730][  0]LogOnline:Warning: No default platform service specified for OnlineSubsystem
[2014.12.01-16.27.56:730][  0]LogInit: Presizing for 0 objects not considered by GC, pre-allocating 0 bytes.
[2014.12.01-16.27.56:746][  0]LogInit: Object subsystem initialized
[2014.12.01-16.27.56:755][  0]LogConsoleResponse:Warning: Skipping Unknown console variable: 'UIScaleRule = ShortestSide'
[2014.12.01-16.27.56:755][  0]LogConsoleResponse:Warning:   Found in ini file 'E:/Unreal Projects/Smashy/Saved/Config/WindowsServer/Engine.ini', in section '[/Script/Engine.RendererSettings]'
[2014.12.01-16.27.56:755][  0]LogConsoleResponse:Warning: Skipping Unknown console variable: 'UIScaleCurve = (EditorCurveData=(Keys=((Time=480.000000,Value=0.444000),(Time=720.000000,Value=0.666000),(Time=1080.000000,Value=1.000000),(Time=8640.000000,Value=8.000000))),ExternalCurve=None)'
[2014.12.01-16.27.56:755][  0]LogConsoleResponse:Warning:   Found in ini file 'E:/Unreal Projects/Smashy/Saved/Config/WindowsServer/Engine.ini', in section '[/Script/Engine.RendererSettings]'
[2014.12.01-16.27.56:756][  0]LogInit: Selected Device Profile: [WindowsServer]
[2014.12.01-16.27.56:756][  0]LogInit: Applying CVar settings loaded from the selected device profile: [WindowsServer]
[2014.12.01-16.27.56:763][  0]LogInit: Computer: EBRITHIL-PC
[2014.12.01-16.27.56:763][  0]LogInit: User: Ebrithil
[2014.12.01-16.27.56:763][  0]LogInit: CPU Page size=4096, Cores=6
[2014.12.01-16.27.56:763][  0]LogInit: High frequency timer resolution =3.320410 MHz
[2014.12.01-16.27.56:763][  0]LogMemory: Memory total: Physical=31.9GB (32GB approx) Virtual=8192.0GB
[2014.12.01-16.27.56:764][  0]LogMemory: Platform Memory Stats for WindowsServer
[2014.12.01-16.27.56:764][  0]LogMemory: Process Physical Memory: 42.74 MB used, 42.74 MB peak
[2014.12.01-16.27.56:764][  0]LogMemory: Process Virtual Memory: 32.84 MB used, 32.97 MB peak
[2014.12.01-16.27.56:764][  0]LogMemory: Physical Memory: 10367.19 MB used, 32687.30 MB total
[2014.12.01-16.27.56:764][  0]LogMemory: Virtual Memory: 175.58 MB used, 8388608.00 MB total
[2014.12.01-16.27.56:793][  0]LogTextLocalizationManager: The requested culture ('en_GB') has no localization data; falling back to 'en' for localization and internationalization data.
[2014.12.01-16.27.56:854][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/Blueprints/Pawns/PlayerPawn.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:854][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/Blueprints/Pawns/PlayerPawn.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:854][  0]LogUObjectGlobals:Warning: Failed to find object 'Class /Game/Blueprints/Pawns/PlayerPawn.PlayerPawn_C'
[2014.12.01-16.27.56:854][  0]Error: CDO Constructor: Failed to find /Game/Blueprints/Pawns/PlayerPawn.PlayerPawn_C
[2014.12.01-16.27.56:855][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/Blueprints/Pawns/BotPawn.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:855][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/Blueprints/Pawns/BotPawn.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:855][  0]LogUObjectGlobals:Warning: Failed to find object 'Class /Game/Blueprints/Pawns/BotPawn.BotPawn_C'
[2014.12.01-16.27.56:855][  0]Error: CDO Constructor: Failed to find /Game/Blueprints/Pawns/BotPawn.BotPawn_C
[2014.12.01-16.27.56:856][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/UI/HUD/HitIndicator.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:857][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/UI/HUD/HitIndicator.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:857][  0]LogUObjectGlobals:Warning: Failed to find object 'Texture2D /Game/UI/HUD/HitIndicator.HitIndicator'
[2014.12.01-16.27.56:857][  0]Error: CDO Constructor: Failed to find /Game/UI/HUD/HitIndicator
[2014.12.01-16.27.56:857][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/UI/HUD/HUDMain.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:857][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/UI/HUD/HUDMain.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:857][  0]LogUObjectGlobals:Warning: Failed to find object 'Texture2D /Game/UI/HUD/HUDMain.HUDMain'
[2014.12.01-16.27.56:857][  0]Error: CDO Constructor: Failed to find /Game/UI/HUD/HUDMain
[2014.12.01-16.27.56:858][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/UI/HUD/HUDAssets02.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:858][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/UI/HUD/HUDAssets02.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:858][  0]LogUObjectGlobals:Warning: Failed to find object 'Texture2D /Game/UI/HUD/HUDAssets02.HUDAssets02'
[2014.12.01-16.27.56:858][  0]Error: CDO Constructor: Failed to find /Game/UI/HUD/HUDAssets02
[2014.12.01-16.27.56:858][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/UI/HUD/LowHealthOverlay.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:858][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/UI/HUD/LowHealthOverlay.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:859][  0]LogUObjectGlobals:Warning: Failed to find object 'Texture2D /Game/UI/HUD/LowHealthOverlay.LowHealthOverlay'
[2014.12.01-16.27.56:859][  0]Error: CDO Constructor: Failed to find /Game/UI/HUD/LowHealthOverlay
[2014.12.01-16.27.56:859][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/UI/HUD/Roboto51.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:859][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/UI/HUD/Roboto51.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:859][  0]LogUObjectGlobals:Warning: Failed to find object 'Font /Game/UI/HUD/Roboto51.Roboto51'
[2014.12.01-16.27.56:859][  0]Error: CDO Constructor: Failed to find /Game/UI/HUD/Roboto51
[2014.12.01-16.27.56:859][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/../Smashy/Content/UI/HUD/Roboto18.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:860][  0]LogLinker:Warning: The file '../../../UnrealSource/../Smashy/Content/UI/HUD/Roboto18.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:860][  0]LogUObjectGlobals:Warning: Failed to find object 'Font /Game/UI/HUD/Roboto18.Roboto18'
[2014.12.01-16.27.56:860][  0]Error: CDO Constructor: Failed to find /Game/UI/HUD/Roboto18
[2014.12.01-16.27.56:861][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/Engine/Content/EngineMeshes/Sphere.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:861][  0]LogLinker:Warning: The file '../../../UnrealSource/Engine/Content/EngineMeshes/Sphere.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:861][  0]LogUObjectGlobals:Warning: Failed to find object 'StaticMesh /Engine/EngineMeshes/Sphere.Sphere'
[2014.12.01-16.27.56:861][  0]Error: CDO Constructor: Failed to find /Engine/EngineMeshes/Sphere
[2014.12.01-16.27.56:865][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/Engine/Content/EngineDamageTypes/DmgTypeBP_Environmental.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:866][  0]LogLinker:Warning: The file '../../../UnrealSource/Engine/Content/EngineDamageTypes/DmgTypeBP_Environmental.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:866][  0]LogUObjectGlobals:Warning: Failed to find object 'Class /Engine/EngineDamageTypes/DmgTypeBP_Environmental.DmgTypeBP_Environmental_C'
[2014.12.01-16.27.56:866][  0]Error: CDO Constructor: Failed to find /Engine/EngineDamageTypes/DmgTypeBP_Environmental.DmgTypeBP_Environmental_C
[2014.12.01-16.27.56:866][  0]LogLinker:Warning: Unable to load package (../../../UnrealSource/Engine/Content/EditorLandscapeResources/DataLayer.uasset). Package contains EditorOnly data which is not supported by the current build or vice versa.
[2014.12.01-16.27.56:867][  0]LogLinker:Warning: The file '../../../UnrealSource/Engine/Content/EditorLandscapeResources/DataLayer.uasset' contains unrecognizable data, check that it is of the expected type.
[2014.12.01-16.27.56:867][  0]LogUObjectGlobals:Warning: Failed to find object 'LandscapeLayerInfoObject /Engine/EditorLandscapeResources/DataLayer.DataLayer'
[2014.12.01-16.27.56:867][  0]Error: CDO Constructor: Failed to find LandscapeLayerInfoObject'/Engine/EditorLandscapeResources/DataLayer.DataLayer'
[2014.12.01-16.27.56:867][  0]LogWindows:Error: Windows GetLastError: The operation completed successfully. (0)
[2014.12.01-16.27.57:253][  0]LogWindows: Could not start CrashReportClient.exe
[2014.12.01-16.27.57:253][  0]LogMemory: Platform Memory Stats for WindowsServer
[2014.12.01-16.27.57:253][  0]LogMemory: Process Physical Memory: 269.38 MB used, 269.88 MB peak
[2014.12.01-16.27.57:253][  0]LogMemory: Process Virtual Memory: 311.81 MB used, 312.49 MB peak
[2014.12.01-16.27.57:253][  0]LogMemory: Physical Memory: 10741.05 MB used, 32687.30 MB total
[2014.12.01-16.27.57:253][  0]LogMemory: Virtual Memory: 532.27 MB used, 8388608.00 MB total
[2014.12.01-16.31.04:898][  0]LogWindows: === Critical error: ===
Assertion failed: VisibilityLayer [File:E:\Unreal Projects\UnrealSource\Engine\Source\Runtime\Engine\Private\Landscape\Landscape.cpp] [Line: 524] 



KERNELBASE.dll!UnknownFunction (0x000007fefd0b940d) + 0 bytes [UnknownFile:0]
SmashyGameServer.exe!FOutputDeviceWindowsError::Serialize() (0x000000013fe51f5c) + 0 bytes [e:\unreal projects\unrealsource\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
SmashyGameServer.exe!FOutputDevice::Logf__VA() (0x000000013fcc8298) + 159 bytes [e:\unreal projects\unrealsource\engine\source\runtime\core\private\misc\outputdevice.cpp:145]
SmashyGameServer.exe!FDebug::AssertFailed() (0x000000013fcada95) + 120 bytes [e:\unreal projects\unrealsource\engine\source\runtime\core\private\misc\outputdevice.cpp:220]
SmashyGameServer.exe!ALandscapeProxy::ALandscapeProxy() (0x00000001411c15ef) + 37 bytes [e:\unreal projects\unrealsource\engine\source\runtime\engine\private\landscape\landscape.cpp:524]
SmashyGameServer.exe!UClass::CreateDefaultObject() (0x000000013fe9e8b2) + 44 bytes [e:\unreal projects\unrealsource\engine\source\runtime\coreuobject\private\uobject\class.cpp:2504]
SmashyGameServer.exe!UObjectLoadAllCompiledInDefaultProperties() (0x000000013ff8f31b) + 0 bytes [e:\unreal projects\unrealsource\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:672]
SmashyGameServer.exe!ProcessNewlyLoadedUObjects() (0x000000013ff7c1a2) + 0 bytes [e:\unreal projects\unrealsource\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:747]
SmashyGameServer.exe!FEngineLoop::PreInit() (0x000000013fa32ba7) + 0 bytes [e:\unreal projects\unrealsource\engine\source\runtime\launch\private\launchengineloop.cpp:1226]
SmashyGameServer.exe!GuardedMain() (0x000000013fa2d6fb) + 15 bytes [e:\unreal projects\unrealsource\engine\source\runtime\launch\private\launch.cpp:112]
SmashyGameServer.exe!GuardedMainWrapper() (0x000000013fa2d80a) + 5 bytes [e:\unreal projects\unrealsource\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
SmashyGameServer.exe!WinMain() (0x000000013fa36539) + 17 bytes [e:\unreal projects\unrealsource\engine\source\runtime\launch\private\windows\launchwindows.cpp:201]
SmashyGameServer.exe!__tmainCRTStartup() (0x0000000142418645) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
kernel32.dll!UnknownFunction (0x00000000771059ed) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x000000007723c541) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x000000007723c541) + 0 bytes [UnknownFile:0]


[2014.12.01-16.31.04:898][  0]LogExit: Executing StaticShutdownAfterError
[2014.12.01-16.31.04:903][  0]LogWindows: FPlatformMisc::RequestExit(1)
[2014.12.01-16.31.04:903][  0]Log file closed, 12/01/14 16:31:04

I get the same error, both in 4.5.0 and 4.5.1 – when attempting to run dedicated server with a nearly-empty c++ project; followed piinecone’s guide on how to get it compiled, at piinecone — Building a dedicated server in Unreal Engine 4

With 4.6.0, using UnrealFrontend to cook WindowsServer, with Data build set to ‘By the book’ solves the problem.