Nav Mesh Bounds Volume - crash when adding to scene

Development World Creation
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1

Hello,

I got this issue where the game crashes when I try to use Nav Mesh Bounds Volumes. When either dragging the component and holding it over the scene window, or placing it in the scene list, it happens.

This is in Unreal 4.4.3 and it does not happen when I try it in a fresh project. Any ideas what could cause this?

Assertion failed: GetWorld()->GetNavigationSystem() != NULL [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Runtime\Engine\Private\NavMeshBoundsVolume.cpp] [Line: 46]

Stack:
Address = 0x2deb5216 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0x2dd38615 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0x20f63acf (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Engine.dll]
Address = 0x2d9d3009 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-CoreUObject.dll]
Address = 0x1ff56ad9 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1ff8ab31 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1ff561aa (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1f926ee5 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1f8c5462 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1fabca11 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1face287 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1facd5a9 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-UnrealEd.dll]
Address = 0x1baf7b9d (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-LevelEditor.dll]
Address = 0x1bb27b9f (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-LevelEditor.dll]
Address = 0x2d393318 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Slate.dll]
Address = 0x2d381860 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Slate.dll]
Address = 0x2de23284 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0x2de0f871 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0x2de2461e (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0x2de0c6e2 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0x4f2f2434 (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x4f2f2297 (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x2de24ac6 (filename not found) [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor-Core.dll]
FEngineLoop::Tick() 0x3025708d + 8 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launchengineloop.cpp:2080] [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor.exe]
GuardedMain() 0x3024ca3c + 0 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launch.cpp:133] [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor.exe]
GuardedMainWrapper() 0x3024caaa + 5 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\windows\launchwindows.cpp:125] [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor.exe]
WinMain() 0x302588c9 + 17 bytes [File=d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\windows\launchwindows.cpp:201] [in C:\Program Files\Unreal Engine\4.4\Engine\Binaries\Win64\UE4Editor.exe]
__tmainCRTStartup() 0x302596f9 + 21 bytes [File=f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618] [in C:\Program Files\Unreal Engine\4.4\Eng

2

I have the same problem. I believe its related to sizing/placing a nav mesh bounds with auto create nav generation turned on.

Try turning off the Nav mesh rebuilding and auto create before moving/sizing the nav mesh bounds. That seemed to be my issue :slight_smile:

3

Hey Daniel,

Please zip and attach the crash logs and dump file for the project when it crashes so we can take a look. You can find information about how to get those files here:

Then check out Devero’s solution below and see if that works for you, and let us know either way. Thanks!

4

Hey Daniel,

We haven’t heard back from you in a few days, so I am marking this post as resolved for tracking purposes and accepting Devero’s answer as correct. If that solution does not work for you and you can provide us with the requested logs, we will look into it further. Thanks!