# \[Replicable\] Foliage Simulation Crash **URL:** \ **Category:** World Creation\ **Tags:** unreal-engine, crash, Foliage, question\ **Created:** [November 29, 2016, 1:26am UTC](https://forums.unrealengine.com/t/replicable-foliage-simulation-crash/377763 "2016-11-29T01:26:49Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Crispy\_Penguin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Crispy\_Penguin](https://forums.unrealengine.com/u/Crispy_Penguin)\ **Post date:** [November 29, 2016, 1:26am UTC](https://forums.unrealengine.com/t/replicable-foliage-simulation-crash/377763/1 "2016-11-29T01:26:49Z")
Hi, Instant crash if you paint some Foliage and click Simulate. Steps to replicate: 1. Create clean 4.14.0 C++ First person template (with starter content) 2. Put any mesh into foliage tool 3. Paint couple meshes 4. Click Simulate Hope this helps, Crispy Crash log ``` Assertion failed: IsValid() [File:D:\Build\++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 794] UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:332] UE4Editor_FoliageEdit!FEdModeFoliage::MouseMove() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\foliageedit\private\foliageedmode.cpp:818] UE4Editor_UnrealEd!FEditorModeTools::MouseMove() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editormodemanager.cpp:760] UE4Editor_UnrealEd!FEditorViewportClient::MouseMove() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorviewportclient.cpp:4772] UE4Editor_Engine!FSceneViewport::OnMouseMove() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\slate\sceneviewport.cpp:634] UE4Editor_Slate!SViewport::OnMouseMove() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\widgets\sviewport.cpp:206] UE4Editor_Slate!::operator()() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5284] UE4Editor_Slate!FEventRouter::Route >() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:215] UE4Editor_Slate!FSlateApplication::RoutePointerMoveEvent() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5274] UE4Editor_Slate!FSlateApplication::ProcessMouseMoveEvent() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5653] UE4Editor_Slate!FSlateApplication::OnMouseMove() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5592] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1693] UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:2071] UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:814] UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:678] user32 user32 UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:951] UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2811] UE4Editor!GuardedMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:152] UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor!WinMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202] UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264] kernel32 ntdll ``` ---
**Author:** ![Crispy\_Penguin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Crispy\_Penguin](https://forums.unrealengine.com/u/Crispy_Penguin)\ **Post date:** [November 29, 2016, 1:30am UTC](https://forums.unrealengine.com/t/replicable-foliage-simulation-crash/377763/2 "2016-11-29T01:30:36Z")
Same behaviour is not present in 4:13.2 or lower ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [November 29, 2016, 4:03pm UTC](https://forums.unrealengine.com/t/replicable-foliage-simulation-crash/377763/3 "2016-11-29T16:03:37Z")
Hello Crispy\_Penguin, Thanks for the clear and precise repro steps. I was able to confirm what you are reporting and have gone ahead and entered a bug report for the issue. You can track the report following the link below on our public issues tracker. **[UE-39122](https://issues.unrealengine.com/issue/UE-39122)** Once the issue has been addressed by our engineers the ticket will be updated and reflected in the public tracker. Let me know if you have further questions or need additional assistance. Cheers, ---
**Author:** ![Crispy\_Penguin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Crispy\_Penguin](https://forums.unrealengine.com/u/Crispy_Penguin)\ **Post date:** [November 29, 2016, 4:05pm UTC](https://forums.unrealengine.com/t/replicable-foliage-simulation-crash/377763/4 "2016-11-29T16:05:43Z")
Hi Andrew, No problem, always glad to help.