UE4 4.7 Preview 4 crash when loading level with foliage

Development World Creation
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1

I get this error when I’m trying to load any of my levels that contain foliage. Is there any way to go back to the preview 3 release? It would be a real bummer if all my projects would be dead from now on.

MachineId:4970870843E9707CFDD4B0B27AEA3C2E
EpicAccountId:1a66738e0eab42c0bd2fac2014197829

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

Assertion failed: InstancedRenderData.InstanceBuffer.GetStride() == sizeof(FInstancingUserData::FInstanceStream) [File:d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\InstancedStaticMesh.h] [Line: 493]

KERNELBASE + 37901 bytes
UE4Editor_Core + 3140052 bytes
UE4Editor_Core + 1614600 bytes
UE4Editor_Core + 1494994 bytes
UE4Editor_Engine + 3798840 bytes
UE4Editor_Engine + 3795880 bytes
UE4Editor_Engine + 4018373 bytes
UE4Editor_Renderer + 1938146 bytes
UE4Editor_Engine + 1358256 bytes
UE4Editor_Engine + 1564936 bytes
UE4Editor_Engine + 1499552 bytes
UE4Editor_Engine + 5069039 bytes
UE4Editor_Engine + 10088576 bytes
UE4Editor_UnrealEd + 6237773 bytes
UE4Editor_UnrealEd + 6405102 bytes
UE4Editor_UnrealEd + 2624356 bytes
UE4Editor_UnrealEd + 2833455 bytes
UE4Editor_UnrealEd + 2761581 bytes
UE4Editor_UnrealEd + 2678685 bytes
UE4Editor_UnrealEd + 6364224 bytes
UE4Editor_UnrealEd + 3235445 bytes
UE4Editor_UnrealEd + 3201323 bytes
UE4Editor_UnrealEd + 3143565 bytes
UE4Editor_UnrealEd + 3247106 bytes
UE4Editor_UnrealEd + 3143634 bytes
UE4Editor_ContentBrowser + 988749 bytes
UE4Editor_ContentBrowser + 1857366 bytes
UE4Editor_ContentBrowser + 1347607 bytes
UE4Editor_ContentBrowser + 1394423 bytes
UE4Editor_ContentBrowser + 1630103 bytes
UE4Editor_ContentBrowser + 1349127 bytes
UE4Editor_ContentBrowser + 1395623 bytes
UE4Editor_ContentBrowser + 1910374 bytes
UE4Editor_ContentBrowser + 1353105 bytes
UE4Editor_ContentBrowser + 1398826 bytes
UE4Editor_ContentBrowser + 1388054 bytes
UE4Editor_ContentBrowser + 1997103 bytes
UE4Editor_ContentBrowser + 1910959 bytes
UE4Editor_Slate + 434814 bytes
UE4Editor_Slate + 159389 bytes
UE4Editor_Slate + 840329 bytes
UE4Editor_Slate + 777371 bytes
UE4Editor_Core + 2484988 bytes
UE4Editor_Core + 2432715 bytes
UE4Editor_Core + 2490430 bytes
UE4Editor_Core + 2422370 bytes
user32 + 105425 bytes
user32 + 104666 bytes
UE4Editor_Core + 3123702 bytes
UE4Editor!FEngineLoop::Tick() + 3641 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2216]
UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:131]
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 Fozwroth,

This is a known issue with Preview 4. You can find the update post about this here: Unreal Engine 4.7 Preview - Announcements - Epic Developer Community Forums

Make sure to follow this thread with regards to any updates for the preview builds. This issue will be resolved with Preview 5.

Unfortunately, there is no way to downgrade your project back to a previously released build.

Thank you!

Tim

3

Thanks for the quick reply! I didn’t realize it was brought up in the release thread.

I’ll sit tight and look for any upcoming updates!