Foilage crash when dragging static mesh into slot

Development Asset Creation
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1

Hello,

so i have a bug with adding in a static mesh to foilage. it keeps crashing. i am using 4.4.2 right now.

this is the crash report:

!Id:e8c94e45003bd68395eddc67222ee3f0

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

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 536]
Array index out of bounds: 0 from an array of size

KERNELBASE + 23544 bytes
UE4Editor_Core + 3095292 bytes
UE4Editor_Core + 1661738 bytes
UE4Editor_Core + 1541824 bytes
UE4Editor_Engine + 3984823 bytes
UE4Editor_FoliageEdit + 436194 bytes
UE4Editor_FoliageEdit + 435727 bytes
UE4Editor_Slate + 795079 bytes
UE4Editor_Slate + 727433 bytes
UE4Editor_Core + 2503893 bytes
UE4Editor_Core + 2422897 bytes
UE4Editor_Core + 2508318 bytes
UE4Editor_Core + 2410210 bytes
user32 + 9268 bytes
user32 + 8855 bytes
UE4Editor_Core + 2509510 bytes
UE4Editor!FEngineLoop::Tick() + 2877 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launchengineloop.cpp:2080]
UE4Editor!GuardedMain() + 476 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launch.cpp:133]
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]

2

Hi Raikuns,

I am more than happy to help, though I will need a bit more information. Does this happen in a blank project with no additional content? Can you post your crash logs here so we can have a look? Additionally, what kind of static mesh and material are you using? If you have anything attempting to produce material wind effects in foliage, this is a known issue that is currently being assessed by development staff. Thank you!

3

hi ,

So i tested some various meshes and i found out that the mesh is bugged. i made costum grass in speedtree from a tutorial but when i export en import it into unreal its bugged it doesnt show annything its a black box and when i try to open in it crashes.(link the crash report down below). but i tried foilage with standard tree from speedtree and it works it doesnt crash at all. so its an export/import issue with that file.

the scene has the standard assets. its just a random scene so i can test various materials and scripts.

Greetz Raikuns

4

Crash report(when dragging the static mesh into foilage spot)

!Id:e8c94e45003bd68395eddc67222ee3f0

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

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 536]
Array index out of bounds: 0 from an array of size

KERNELBASE + 23544 bytes
UE4Editor_Core + 3095292 bytes
UE4Editor_Core + 1661738 bytes
UE4Editor_Core + 1541824 bytes
UE4Editor_Engine + 3984823 bytes
UE4Editor_FoliageEdit + 436194 bytes
UE4Editor_FoliageEdit + 435727 bytes
UE4Editor_Slate + 795079 bytes
UE4Editor_Slate + 727433 bytes
UE4Editor_Core + 2503893 bytes
UE4Editor_Core + 2422897 bytes
UE4Editor_Core + 2508318 bytes
UE4Editor_Core + 2410210 bytes
user32 + 9268 bytes
user32 + 8855 bytes
UE4Editor_Core + 2509510 bytes
UE4Editor!FEngineLoop::Tick() + 2877 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launchengineloop.cpp:2080]
UE4Editor!GuardedMain() + 476 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launch.cpp:133]
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]

5

i can also post the crash report when opening the static mesh but the report is 1300 words too long

6

Hi Raikuns,

Does the mesh have any wind materials affecting it? There is a known issue with wind materials in foliage mode that is currently being assessed.

7

this is what it looks like in the content browser. and i imported it without wind/detail/and vertex proceccing.

http://puu.sh/bB8z3/2f24b3ce7b.jpg

so its probebly that the mesh is corrupted or that i did something wrong.

link text

8

Hi Raikuns,

The problem does seem mesh specific. When we looked at it, the foliage mesh has a material but has no polygons or vertices. This is what is causing the crash. Try using a different static mesh and see if it produces the same error.

9

Hi Raikuns,

We have not heard from you in quite some time. I am marking this as answered for tracking purposes. If you are still experiencing this crash, please comment with the requested information.