We were using Unreal 4.10 for our project, but due to issues (severe memory leaks, unable to package our wWise build) we decided to rollback to version 4.9.1 which always worked well for us. When we converted the project and opened the project we got this error. We also tried creating a new empty project, migrating over our Content folder, and still get this exact same error. Any help would be greatly appreciated.
Unknown exception - code 00000001 (first/second chance not available)
"Fatal error: [File:C:\Program Files\Epic Games\4.9.1-wWise\Engine\Source\Runtime\Core\Private\HAL\FileManagerGeneric.cpp] [Line: 647]
Invalid BufferCount=0 while reading …//…//…//…//…//…//U
UE4Editor_Core!FDebug::AssertFailed() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
UE4Editor_Core!FArchiveFileReaderGeneric::InternalPrecache() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:647]
UE4Editor_Core!FArchiveFileReaderGeneric::Serialize() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:686]
UE4Editor_CoreUObject!operator<<() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\coreuobject\private\uobject\linker.cpp:56]
UE4Editor_CoreUObject!operator<<() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\core\public\containers\array.h:1201]
UE4Editor_CoreUObject!operator<<() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\coreuobject\private\uobject\packagefilesummary.cpp:214]
UE4Editor_AssetRegistry!FPackageReader::OpenPackageFile() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\assetregistry\private\packagereader.cpp:37]
UE4Editor_AssetRegistry!FAssetDataGatherer::ReadAssetFile() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:422]
UE4Editor_AssetRegistry!FAssetDataGatherer::Run() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\assetregistry\private\assetdatagatherer.cpp:186]
UE4Editor_Core!FRunnableThreadWin::Run() [c:\program files\epic games\4.9.1-wwise\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]