4.7.6 Crashed, an unhandled win32 exception occurred in UE4Editor.exe

Development Platform & Builds
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1

This crashed report that shows

MachineId:
EpicAccountId:

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

Assertion failed: InPos<=Bytes.Num() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\Core\Public\Serialization\Archive.h] [Line: 171]

KERNELBASE + 34588 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_AssetRegistry!FMemoryReader::Seek() + 78 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\serialization\archive.h:172]
UE4Editor_AssetRegistry!FNameTableArchiveReader::SerializeNameMap() + 117 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\assetregistry\private\nametablearchive.cpp:45]
UE4Editor_AssetRegistry!FNameTableArchiveReader::LoadFile() + 188 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\assetregistry\private\nametablearchive.cpp:26]
UE4Editor_AssetRegistry!FAssetDataGatherer::Run() + 236 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:79]
UE4Editor_Core!FRunnableThreadWin::Run() + 102 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:73]
UE4Editor_Core!FRunnableThreadWin::GuardedRun() + 93 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:26]
kernel32 + 5074 bytes
ntdll + 87124 bytes

2

Hi SherwynSin,

This was a known issue in 4.7 and 4.8 that has already been fixed for 4.9 and beyond (UE-18312). Thanks for report!

3

Hi ,
How do I go about and around this error if I will like to work on 4.7?

Thank you!

4

Unfortunately we were never able to get a reproducible case internally, so we can’t say specifically what actions will cause crash. Most of reports we got indicated it occurred during startup. There hasn’t been a repeat of bug reported in our Crash Tracker since fix was implemented in 4.9.

only thing I can recommend is to delete your Intermediate and Saved folders in project. Otherwise, we don’t have any known way of working around crash.