Crash on starting in vr preview, opening character blueprint 4.75

Mooksbro · April 13, 2015, 10:28pm

My project crashes when trying to open my character blueprint and also when I try to play it. I am able to play a level in simulate mode. I added the myo plugin and everything was working in 4.73. After updated to 4.75 and opened my project, and am unable to play it only simulate, and unable to open my character blueprint. A message " loading Bp_character" comes up briefly, then the editor shuts down.
When trying to open vr preview a blank white screen appears briefly before the crash occurs. When opening stand alone and play in view port, it just crashes. Unfortunately I did not make a clone to open it first in 4.75 . Is it possible to roll back the update or will I have to rebuild the project in 4.75?
I did a test in 4.75 with a new template rift project and everything looks ok, can open blueprints, play with vr preview, standalone, and play in view port.

Crash log from opening level in VR preview:
Fatal error!

Unhandled Exception: 0xe06d7363

KERNELBASE.dll!UnknownFunction (0x00007ff915718b9c) + 0 bytes [UnknownFile:0]
MSVCR120.dll!UnknownFunction (0x00007ff90684ef63) + 0 bytes [UnknownFile:0]
UE4Editor-MyoPlugin.dll!UnknownFunction (0x00007ff8eb5a373c) + 0 bytes [UnknownFile:0]
UE4Editor-MyoPlugin.dll!UnknownFunction (0x00007ff8eb5a50e6) + 0 bytes [UnknownFile:0]
UE4Editor-MyoPlugin.dll!UnknownFunction (0x00007ff8eb5a4b7a) + 0 bytes [UnknownFile:0]
UE4Editor-MyoPlugin.dll!UnknownFunction (0x00007ff8eb5ab1d0) + 0 bytes [UnknownFile:0]
UE4Editor-MyoPlugin.dll!UnknownFunction (0x00007ff8eb5ac307) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UActorComponent::ExecuteRegisterEvents() (0x00007ff8f93c1490) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorcomponent.cpp:945]
UE4Editor-Engine.dll!UActorComponent::RegisterComponentWithWorld() (0x00007ff8f93f9b0e) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorcomponent.cpp:749]
UE4Editor-Engine.dll!`anonymous namespace’::RegisterInstancedComponent() (0x00007ff8f99dfc80) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\simpleconstructionscript.cpp:27]
UE4Editor-Engine.dll!USimpleConstructionScript::ExecuteScriptOnActor() (0x00007ff8f99b2635) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\simpleconstructionscript.cpp:383]
UE4Editor-Engine.dll!AActor::ExecuteConstruction() (0x00007ff8f93c0ef9) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorconstruction.cpp:536]
UE4Editor-Engine.dll!AActor::PostSpawnInitialize() (0x00007ff8f93f4bd0) + 193 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actor.cpp:2316]
UE4Editor-Engine.dll!UWorld::SpawnActor() (0x00007ff8f977cf02) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\levelactor.cpp:336]
UE4Editor-Kismet.dll!FBlueprintEditor::UpdatePreviewActor() (0x00007ff8f87fffc1) + 81 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\kismet\private\blueprinteditor.cpp:7235]
UE4Editor-Kismet.dll!FBlueprintEditor::Tick() (0x00007ff8f87fbb43) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\kismet\private\blueprinteditor.cpp:6242]
UE4Editor-UnrealEd.dll!FTickableEditorObject::TickObjects() (0x00007ff8f388f504) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\public\tickableeditorobject.h:15]
UE4Editor-UnrealEd.dll!UEditorEngine::Tick() (0x00007ff8f388d573) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editor.cpp:1110]
UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() (0x00007ff8f3d48306) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedengine.cpp:347]
UE4Editor.exe!FEngineLoop::Tick() (0x00007ff667d20263) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2257]
UE4Editor.exe!GuardedMain() (0x00007ff667d1267c) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor.exe!GuardedMainWrapper() (0x00007ff667d126ea) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() (0x00007ff667d22219) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor.exe!__tmainCRTStartup() (0x00007ff667d23159) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!UnknownFunction (0x00007ff9158913d2) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff91821e954) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ff91821e954) + 0 bytes [UnknownFile:0]

Crash log from opening blueprint:

MachineId:81EF604B415935E408E0398C76E0EBD5
EpicAccountId:86b852cec4d843c9b933f754fd8649c8

C++ EH exception - code e06d7363 (first/second chance not available)

KERNELBASE + 35740 bytes
msvcr120 + 388963 bytes
UE4Editor_MyoPlugin + 14140 bytes
UE4Editor_MyoPlugin + 20710 bytes
UE4Editor_MyoPlugin + 19322 bytes
UE4Editor_MyoPlugin + 45520 bytes
UE4Editor_MyoPlugin + 49927 bytes
UE4Editor_Engine!UActorComponent::ExecuteRegisterEvents() + 48 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorcomponent.cpp:945]
UE4Editor_Engine!UActorComponent::RegisterComponentWithWorld() + 942 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorcomponent.cpp:749]
UE4Editor_Engine!`anonymous namespace’::RegisterInstancedComponent() + 32 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\simpleconstructionscript.cpp:27]
UE4Editor_Engine!USimpleConstructionScript::ExecuteScriptOnActor() + 1765 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\simpleconstructionscript.cpp:383]
UE4Editor_Engine!AActor::ExecuteConstruction() + 489 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorconstruction.cpp:536]
UE4Editor_Engine!AActor::PostSpawnInitialize() + 672 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actor.cpp:2316]
UE4Editor_Engine!UWorld::SpawnActor() + 2674 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\levelactor.cpp:336]
UE4Editor_Kismet!FBlueprintEditor::UpdatePreviewActor() + 577 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\kismet\private\blueprinteditor.cpp:7235]
UE4Editor_Kismet!FBlueprintEditor::Tick() + 67 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\kismet\private\blueprinteditor.cpp:6242]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() + 164 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\public\tickableeditorobject.h:15]
UE4Editor_UnrealEd!UEditorEngine::Tick() + 1635 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editor.cpp:1110]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() + 22 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedengine.cpp:347]
UE4Editor!FEngineLoop::Tick() + 4179 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2257]
UE4Editor!GuardedMain() + 1404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

anonymous_user_e729f54e · April 14, 2015, 3:05pm

Hello Damian Costello,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

When you create the clean project, did you incorporate the the Myo plugin?
If not, could you try incorporating the Myo plugin to see if this will cause the crash that you are seeing?
Are you using the Myo plugin that was made by the user getnamo? (Link: [Plugin] Myo - C++ - Epic Developer Community Forums)

The reason that I am asking about the Myo plugin is because I have found that there are other users experiencing this same crash after upgrading to the 4.7.4 and above versions of the engine. You will need to speak with the creator of the plugin about updating their plugin for the newest version of the engine.

As for being able to roll back your project to a former engine version:

This will not be possible without a copy of the engine that you would like to roll back to and if you are using binary then you will not be able to download the individual subversion of the engine. You could try opening a back up of your project that is automatically generated. This can be found in the saved folder of your project. I hope that this information helps.

Make it a great day

anonymous_user_e729f54e · April 20, 2015, 2:22pm

Hello Damian Costello,

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 the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you.