Constant crash on starting project

Development Platform & Builds
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1

Hello, so when ever i try and start my game project it gets to about 95% and then crashes. i thought it might be the just that level so i changed the start up level to the StartMenu. it started up and i can access the project now the question is how can i access the level that keeps crashing every time i try to load it… even when im in the project, it wont load and crashes. this is all weird because it opened last night and nothing was changed and moved i just had it open to show someone… and i really dont wanna start completely over i spent countless hours on this level
here is the Crash Report

MachineId:C0BB37D048EBEF556D4839AFA5617AB5
EpicAccountId:34c3565910104b02b686b111d7aa0bbc

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

Assertion failed: FCompression::UncompressMemory( Flags, Dest, Chunk.UncompressedSize, CompressedBuffer, Chunk.CompressedSize, (Padding > 0) ? true : false ) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\Core\Pri

KERNELBASE + 48333 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() + 248 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() + 1079 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor_Core!FArchive::SerializeCompressed() + 961 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\serialization\archive.cpp:394]
UE4Editor_CoreUObject!FUntypedBulkData::SerializeBulkData() + 172 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\serialization\bulkdata.cpp:1009]
UE4Editor_CoreUObject!FUntypedBulkData::LoadDataIntoMemory() + 123 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\serialization\bulkdata.cpp:1113]
UE4Editor_CoreUObject!FUntypedBulkData::DetachFromArchive() + 147 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\serialization\bulkdata.cpp:893]
UE4Editor_CoreUObject!ULinkerLoad::DetachAllBulkData() + 233 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3933]
UE4Editor_CoreUObject!ULinkerLoad::Detach() + 27 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3849]
UE4Editor_CoreUObject!ResetLoaders() + 1108 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:383]
UE4Editor_CoreUObject!UObject::Rename() + 842 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\obj.cpp:130]
UE4Editor_Engine!AActor::Rename() + 77 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actor.cpp:614]
UE4Editor_Engine!UNavigationSystem::CreateNavigationDataInstance() + 494 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\ai\navigation\navigationsystem.cpp:2917]
UE4Editor_Engine!UNavigationSystem::UpdateAbstractNavData() + 701 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\ai\navigation\navigationsystem.cpp:297]
UE4Editor_Engine!UNavigationSystem::DoInitialSetup() + 27 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\ai\navigation\navigationsystem.cpp:268]
UE4Editor_Engine!UNavigationSystem::OnWorldInitDone() + 61 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\ai\navigation\navigationsystem.cpp:460]
UE4Editor_Engine!UNavigationSystem::InitializeForWorld() + 275 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\ai\navigation\navigationsystem.cpp:1983]
UE4Editor_UnrealEd!UEditorEngine::Map_Load() + 8712 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorserver.cpp:2382]
UE4Editor_UnrealEd!UEditorEngine::HandleMapCommand() + 349 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorserver.cpp:5680]
UE4Editor_UnrealEd!UEditorEngine::Exec() + 797 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorserver.cpp:5180]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() + 273 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedsrv.cpp:742]
UE4Editor_UnrealEd!FEditorFileUtils::LoadMap() + 789 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\filehelpers.cpp:1910]
UE4Editor_AssetTools!FAssetTypeActions_World::OpenAssetEditor() + 216 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\developer\assettools\private\assettypeactions\assettypeactions_world.cpp:23]
UE4Editor_UnrealEd!FAssetEditorManager::OpenEditorForAsset() + 1085 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\toolkits\asseteditormanager.cpp:301]
UE4Editor_UnrealEd!FAssetEditorManager::OpenEditorForAssets() + 199 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\toolkits\asseteditormanager.cpp:326]
UE4Editor_ContentBrowser!FAssetContextMenu::ExecuteEditAsset() + 226 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\contentbrowser\private\assetcontextmenu.cpp:1104]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,FAssetContextMenu,0,TTypeWrapper cdecl(void)>::Execute() + 44 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,FAssetContextMenu,0,void cdecl(void)>::ExecuteIfSafe() + 54 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_Slate!SMenuEntryBlock::OnClicked() + 1059 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:892]
UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() + 24 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:842]
UE4Editor_Slate!TMemberFunctionCaller::operator()<>() + 71 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor_Slate!TTupleImpl >::ApplyAfter_ExplicitReturnType >() + 25 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\tuple.h:113]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply cdecl(void)>::Execute() + 89 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_Slate!TBaseDelegate::Execute() + 26 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:439]
UE4Editor_Slate!SButton::OnMouseButtonUp() + 339 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:228]
UE4Editor_Slate!::operator()() + 188 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3985]
UE4Editor_Slate!FEventRouter::Route >() + 215 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:202]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() + 601 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3988]
UE4Editor_Slate!FSlateApplication::OnMouseUp() + 294 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3949]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() + 3573 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1373]
UE4Editor_Core!FWindowsApplication::DeferMessage() + 318 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1669]
UE4Editor_Core!FWindowsApplication::ProcessMessage() + 4016 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:742]
UE4Editor_Core!FWindowsApplication::AppWndProc() + 114 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:604]
user32 + 105425 bytes
user32 + 104666 bytes
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() + 118 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:774]
UE4Editor!FEngineLoop::Tick() + 3737 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2233]
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]

2

Hi CandRpartnership

Can you provide me with the project, including the map which is causing the crash? If it is too large to upload here, you can feel free to upload it to a third party site such as dropbox. In the meantime, can you remember what you last did before this crash started occurring? If you deleted, added, or modified anything, that information would be very helpful.

3

hey i put the whole project into a .rar and its 6 gbs is that fine? and that last thing i did was just add a tree but never actually imported it into the level just the Content browser and then closed the engine and started it up last night it worked (this was to show someone what i was working on) so nothing was moved touched or deleted or modified. then this morning now its not working at all on opening.

4

The size is alright, it will have to be uploaded elsewhere then linked here however as it can’t fit in the attachment section for Answerhub.

5

okay im uploading i dont have the best upload speed so it may take like 8 hours from now so by 8 pm tonight (currently 11am) i should hopefully comment the link thanks so much! ill post if something happens to uploading process

6

Sounds good. At that time of the evening, I won’t be able to get to it til tomorrow, but I’ll take a look as soon as I am able.

7

is there a place where i can private message you then link i don’t feel comfortable posting the link to all my content publicly?

8

Sure thing, you can send me a private message on the forums.

https://forums.unrealengine.com/

My forum user name is

9

Hey i sent you the PM on the forum of the download link thanks for the patience.

10

Hi CandRpartnership

I apologize for having you spend all that time uploading your project but it seems as though the map itself has become corrupted and there is nothing I can do to restore it. This could be caused by an error that occurred while saving or the editor being closed while saving among many other things. Unfortunately I don’t have anything I can offer to fix the issue.

Edit: A little added information. I was considering entering a bug report for this particular issue as asserts can sometimes be the editor throwing out a flag on something that really shouldn’t crash, but after editing the source code to remove the assert itself, the editor would just hang and freeze instead of crashing when attempting to load the map.

I don’t see the map myself in here, but you should try looking in the Saved → Backup folder. I’m not sure if you renamed the map at sometime and I’m not recognizing it, but it doesn’t seem to be there otherwise.

I hope you have a great day nevertheless,

11

Well that sucks… well at least i have all my assets. one question is there any way even tho i cant open that Level map to somehow copy over that maps Level Blueprint to a brand new map that im going to haft to start? because i don’t remember everything i had in there and it would be sooo easy to copy and paste if possible
or at least find it

12

Unfortunately the map needs to be opened to access the level blueprint as they are part of the same file.

13

okay so i found a autosave of the map in the backups i replaced the file. opened it up and the world loaded! then i switched to the other level and Played the progress and the level loaded then also. so left cameback started up engine open level and crashed… ughhh i dont understand