Ran Out Of Memory problem when im try open my project

Hello Guys (and sorry for poor english)
Im using 4.9.2 and i have got a weird problem tonight
Im close my project normaly last night but today im try open my project im getting crush and my pc slowing so much.
I dont know why im getting this crush and i dont understand X_X Some one please help me cuz my everything in this project :’(
Here My crash Report :
MachineId:B130D1364DD75D8D4C26D392466FBD75
EpicAccountId:c307c21d1a8c4ea4a50a13591c268c85

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

"Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.9\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMemory.cpp] [Line: 77]
Ran out of memory allocating 3520156128 by

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
UE4Editor_Core!FGenericPlatformMemory::OnOutOfMemory() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\genericplatform\genericplatformmemory.cpp:78]
UE4Editor_Core!FMallocTBB::Realloc() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\hal\malloctbb.cpp:99]
UE4Editor_Core!FHeapAllocator::ForAnyElementType::ResizeAllocation() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\public\containers\containerallocationpolicies.h:344]
UE4Editor_AssetRegistry!TArray::Emplace() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\public\containers\array.h:1735]
UE4Editor_AssetRegistry!FNameTableArchiveReader::SerializeNameMap() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\assetregistry\private\nametablearchive.cpp:52]
UE4Editor_AssetRegistry!FNameTableArchiveReader::LoadFile() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\assetregistry\private\nametablearchive.cpp:31]
UE4Editor_AssetRegistry!FAssetDataGatherer::Run() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:79]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]

Here myPc’s Spec :
intel core 2 quad processor//
6gb Ram//
Gtx 550 ti Direct Cu graphic Card//
343 Gb Free storage area in HDD//
im work normally in this pc :confused:
Already Thanks for help guys