Unreal Editor 4.7 crashes

Development Platform & Builds
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1

Hi,

Since migrating to 4.7 I keep getting lots of crashes. This is annoying to say the least, but since this morning I can’t even launch or package my project. I get this error:

[2015.02.27-12.14.04:641][ 0]LogWindows: === Critical error: ===
Assertion failed: SerializedElementSize == 0 || SerializedElementSize == ElementSize [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1227]
Expected 4, Got: 2116141182

KERNELBASE.dll!UnknownFunction (0x000007fefd58940d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() (0x000007fee7a88004) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor-Core.dll!FOutputDevice::Logf__VA() (0x000007fee7907808) + 159 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor-Core.dll!FDebug::AssertFailed() (0x000007fee78e8b07) + 62 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor-Engine.dll!TArray >::BulkSerialize() (0x000007fee17f5609) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\containers\array.h:1232]
UE4Editor-Engine.dll!FStaticLODModel::Serialize() (0x000007fee1847058) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\skeletalmesh.cpp:1205]
UE4Editor-Engine.dll!TIndirectArray::Serialize() (0x000007fee18463f5) + 100 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\containers\array.h:3030]
UE4Editor-Engine.dll!USkeletalMesh::Serialize() (0x000007fee18479d5) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\skeletalmesh.cpp:2294]
UE4Editor-CoreUObject.dll!ULinkerLoad::Preload() (0x000007fee8d6a1e7) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2967]
UE4Editor-CoreUObject.dll!EndLoad() (0x000007fee8e06a1e) + 24 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1087]
UE4Editor-CoreUObject.dll!LoadPackageInternal() (0x000007fee8e123ba) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:845]
UE4Editor-UnrealEd.dll!UCookCommandlet::Cook() (0x000007fee4af07ac) + 25 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\commandlets\cookcommandlet.cpp:1429]
UE4Editor-UnrealEd.dll!UCookCommandlet::Main() (0x000007fee4b20638) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\commandlets\cookcommandlet.cpp:578]
UE4Editor-Cmd.exe!FEngineLoop::PreInit() (0x000000013f68ba3a) + 96 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:1536]
UE4Editor-Cmd.exe!GuardedMain() (0x000000013f6821fb) + 15 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:110]
UE4Editor-Cmd.exe!GuardedMainWrapper() (0x000000013f6826ea) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor-Cmd.exe!WinMain() (0x000000013f692219) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor-Cmd.exe!__tmainCRTStartup() (0x000000013f692d05) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
kernel32.dll!UnknownFunction (0x00000000773959ed) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00000000774cc541) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00000000774cc541) + 0 bytes [UnknownFile:0]

[2015.02.27-12.14.04:641][ 0]LogExit: Executing StaticShutdownAfterError
[2015.02.27-12.14.04:643][ 0]LogWindows: FPlatformMisc::RequestExit(1)
[2015.02.27-12.14.04:643][ 0]Log file closed, 02/27/15 13:14:04

2

Hey Txukie,

I’m trying to nail down this issue but we don’t have any repro steps or hints as to what might be causing it. A few questions:

1: Does this only happen in one project, or in all projects (even new ones)?

2: Does this still happen on 4.7.2?

3

Hi Txukie,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing an issue of 4.7 crashing, please respond to this message with the requested information and we will offer further assistance.

Thank you.