Unknown exception - code 00000001

Development Platform & Builds
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1

HI:
I just update 4.9.2 version . then launching editor crashed.Now I can’t open the project because at 83% it crashes and shows this error:

MachineId:CAAF535341E936FECA5438A0F5485C05
EpicAccountId:aacdc5a9d28e407c86bc64fcbb40918d

Unknown exception - code 00000001 (first/second chance not available)

"Assertion failed: VFType [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.9\Engine\Source\Runtime\Engine\Private\Materials\MaterialShader.cpp] [Line: 1698]
"

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
UE4Editor_Engine!FMaterialShaderMap::Serialize() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\materialshader.cpp:1698]
UE4Editor_Engine!FMaterialShaderMap::LoadFromDerivedDataCache() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\materialshader.cpp:782]
UE4Editor_Engine!FMaterial::CacheShaders() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\materialshared.cpp:1337]
UE4Editor_Engine!FMaterial::CacheShaders() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\materialshared.cpp:1289]
UE4Editor_Engine!UMaterial::CacheShadersForResources() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\material.cpp:1839]
UE4Editor_Engine!UMaterial::CacheResourceShadersForRendering() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\material.cpp:1757]
UE4Editor_Engine!UMaterial::PostLoad() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\material.cpp:2371]
UE4Editor_CoreUObject!UObject::ConditionalPostLoad() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\obj.cpp:723]
UE4Editor_CoreUObject!EndLoad() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1285]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1041]
UE4Editor_CoreUObject!ResolveName() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:680]
UE4Editor_CoreUObject!StaticLoadObjectInternal() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:767]
UE4Editor_CoreUObject!StaticLoadObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:831]
UE4Editor_Engine!LoadSpecialMaterial() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\unrealengine.cpp:1610]
UE4Editor_Engine!UEngine::InitializeObjectReferences() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\unrealengine.cpp:1655]
UE4Editor_UnrealEd!UEditorEngine::InitializeObjectReferences() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorengine.cpp:541]
UE4Editor_Engine!UEngine::Init() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\unrealengine.cpp:780]
UE4Editor_UnrealEd!UEditorEngine::InitEditor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorengine.cpp:430]
UE4Editor_UnrealEd!UEditorEngine::Init() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorengine.cpp:585]
UE4Editor_UnrealEd!UUnrealEdEngine::Init() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\unrealedengine.cpp:49]
UE4Editor!FEngineLoop::Init() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\launchengineloop.cpp:2095]
UE4Editor_UnrealEd!EditorInit() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\unrealed.cpp:63]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\launch.cpp:133]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]

What can I do? It’s a bit important for me to get this working again as soon as possible because it’s a project for the university @_@

Thank you in advance!

2

Hi wangryz -

This may be an issue with the DerivedDataCache that the engine is using. So, go into your Epic Games Engine Installation Folder, usually C:\Program Files\Epic Games\4.9\Engine\ and delete any Derived Data Cache Folders and all contents. You will also want to do that for any projects as well.

Finally you will want to go to C:\Users[Your User Name on the PC]\AppData\Local\UnrealEngine\4.9\ and again delete the Derived Data Cache Subfolder, you will need to see Hidden Files for this part of the operation.

After doing all the deletions, go back to the launcher and attempt to open a 4.9.2 project again. With the DDC folders gone, the engine will have to rebuild a lot of files so the first time it opens it might take a while, but hopefully this will get you unsuck and back to it.

Let me know if this does not fix up the issue for you OR if the call stack you get when you crash changes.

Thank You

Eric Ketchum