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Unreal crashes on opening level

Crashes as soon as I open the level I have been working on, completely out of the blue. Worked fine the other day and now it won't open :(

This is the bug report :


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

Assertion failed: !bGenerateNonMirroredCollision || CookedDataReader.ConvexMeshes.Num() == 0 || CookedDataReader.ConvexMeshes.Num() == AggGeom.ConvexElems.Num() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Runtime\Engine

KERNELBASE + 23544 bytes UE4Editor_Core + 3095292 bytes UE4Editor_Core + 1661738 bytes UE4Editor_Core + 1541824 bytes UE4Editor_Engine + 14143455 bytes UE4Editor_Engine + 14259812 bytes UE4Editor_CoreUObject + 899050 bytes UE4Editor_CoreUObject + 1329894 bytes UE4Editor_CoreUObject + 1400728 bytes UE4Editor_UnrealEd + 2593508 bytes UE4Editor_UnrealEd + 2540781 bytes UE4Editor_UnrealEd + 2466449 bytes UE4Editor_UnrealEd + 5632240 bytes UE4Editor_UnrealEd + 2959412 bytes UE4Editor_UnrealEd + 2958584 bytes UE4Editor_UnrealEd + 5826192 bytes UE4Editor_UnrealEd + 5628448 bytes UE4Editor!GuardedMain() + 285 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launch.cpp:125] UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\windows\launchwindows.cpp:125] UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\windows\launchwindows.cpp:201] UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Thank you for the help

Product Version: Not Selected
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asked Oct 10 '14 at 12:46 AM in Bug Reports

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avatar image Ben Halliday STAFF Oct 10 '14 at 01:27 PM

Hey Denjino,

Thank you for your report.

We have assigned this issue to a member of our support staff, and they will begin investigation as soon as possible. If we are unable to reproduce the issue, or we need additional information, our staff member will comment here with additional questions. Otherwise, we will post an ‘Answer’ once we have logged the issue in our bug database or we have a solution for it.

In the meantime, please be sure to review our suggestions for how to report a bug, and feel free to edit your post if you have additional information to provide:


Please zip and attach the crash log and dump file for the project after it crashes.


avatar image Adam Davis STAFF Oct 10 '14 at 07:27 PM

Hi Denjino,

Does this occur on a blank project with no additional content? Additionally, can you post your logs here so we can have a look?

Please note that these logs contain your email address. If you are not comfortable posting them here, please feel free to message them to me on the forums at forums.unrealengine.com.

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1 answer: sort voted first

It occurs on a project that has a fair bit of content in it.

I opened the project on the new preview of 4.5 and it works fine. I think for now i'll just go with it and post back if it occurs again.

Thanks of the help.

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answered Oct 10 '14 at 08:46 PM

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