[Crash] Crash when placing blueprint

Hi this error has happened several times a night since the latest build.
It happens when I place blueprints with construction script. It happens on several type of blueprints as well.

Assertion failed: !HitProxy || ( HitProxy && !HitProxy->IsA( HWidgetAxis::StaticGetType() ) ) [File:D:\BuildFarm\buildmachine_++depot+UE4-Rocket+Beta5\Engine\Source\Editor\UnrealEd\Private\LevelEditorViewport.cpp] [Line: 725]

Stack:
Address = 0xe16e2a26 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe15f44fa (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xddd43e9b (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-UnrealEd.dll]
Address = 0xd5fea33e (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-LevelEditor.dll]
Address = 0xd60027ef (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-LevelEditor.dll]
Address = 0xded7c046 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Slate.dll]
Address = 0xded72fbe (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Slate.dll]
Address = 0xe169c999 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe168f826 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe169d5fe (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe168cbd2 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0x77149bd1 (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x771498da (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0xe16d3f79 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe169da4b (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0x3f329421 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f31ed60 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f31edca (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f32ae1b (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f32bae3 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x7724652d (filename not found) [in C:\Windows\system32\kernel32.dll]
Address = 0x7737c521 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]
Address = 0x7737c521 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]

Address = 0xfc5c9e5d (filename not found) [in C:\Windows\system32\KERNELBASE.dll]
Address = 0xe16e10fc (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe1612ec2 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe15f459f (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xddd43e9b (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-UnrealEd.dll]
Address = 0xd5fea33e (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-LevelEditor.dll]
Address = 0xd60027ef (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-LevelEditor.dll]
Address = 0xded7c046 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Slate.dll]
Address = 0xded72fbe (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Slate.dll]
Address = 0xe169c999 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe168f826 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe169d5fe (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe168cbd2 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0x77149bd1 (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x771498da (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0xe16d3f79 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe169da4b (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0x3f329421 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f31ed60 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f31edca (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f32ae1b (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x3f32bae3 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor.exe]
Address = 0x7724652d (filename not found) [in C:\Windows\system32\kernel32.dll]
Address = 0x7737c521 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]
Address = 0x7737c521 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]

Hi Jeremy,

Thank you for your report. I am investigating this issue, but I have a few questions. Do you have any reproduction steps for getting the crash? What is being done in the construction script? Could you please attach your log file of the crash located in your [Project Folder]/Saved/Logs folder?

Thank you,

Alexander

The same object sometimes crash a and sometimes don’t… I’m still trying to pinpoint the exact cause. But as of today I can confirm that the grass in blueprint demo crashes as well. In both times while I was duplicating them in the editor window

link text

Hi Jeremy,

Thank you for your report. I have found the crash you are describing. It has since been resolved in our main branch and will be implemented in a future release of the editor.

Cheers!

Alexander