Unreal Engine 4.12.5 won't start

blackdiamant35 · August 24, 2016, 9:31am

I’ve just installed Unreal Engine on my Windows 7 64 bit machine with the EPIC launcher. I can create a project but when I run the soft it crashes with this message.
Thanks to help me

Assertion failed: InPos <= Size [File:D:\Build++UE4+Release-4.12+Compile\Sync\Engine\Source\Runtime\Core\Private\HAL\FileManagerGeneric.cpp] [Line: 617]
Attempted to seek past the end of file (79329/263), file: C:/Users/black/Documents/Unreal Projects/test2/Content/StarterContent/Architecture/Floor_400x400.uasset. The file is most likely corrupt.

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:440]
UE4Editor_Core!FArchiveFileReaderGeneric::Seek() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:618]
UE4Editor_AssetRegistry!FPackageReader::ReadAssetRegistryData() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\assetregistry\private\packagereader.cpp:147]
UE4Editor_AssetRegistry!FAssetDataGatherer::ReadAssetFile() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:820]
UE4Editor_AssetRegistry!FAssetDataGatherer::Run() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:570]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]

Sean_L · August 24, 2016, 12:24pm

Hello,

If this is happening with all projects, I recommend reinstalling the engine. It looks like one of the files somehow got corrupted if you take a look at the error message. Go ahead and reinstall 4.12, and let me know if that resolves the issue.

Also, you can try opening a project that does not contain starter content, as that might not crash if it’s not looking for that particular Floor asset.

Have a great day