Crash upon pressing Play in project [4.6.1]

Hi everyone. When I try to play my level, Unreal Engine 4 will crash and close. It appears to be specific to one of my levels as when I play the other one, it plays as expected. Can anyone help as this is putting a halt on my project now. This the crash error I receive:

MachineId:CF6C5FDE44E9B79428794B9E0CF2E7A0
EpicAccountId:

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

Assertion failed: TargetDelegate [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp] [Line: 5407]

KERNELBASE + 37901 bytes
UE4Editor_Core + 3092349 bytes
UE4Editor_Core + 1597688 bytes
UE4Editor_Core + 1479058 bytes
UE4Editor_UnrealEd + 9502651 bytes
UE4Editor_Engine + 5012673 bytes
UE4Editor_UnrealEd + 9881575 bytes
UE4Editor_UnrealEd + 4557402 bytes
UE4Editor_UnrealEd + 4660963 bytes
UE4Editor_UnrealEd + 1801811 bytes
UE4Editor_UnrealEd + 6686342 bytes
UE4Editor!FEngineLoop::Tick() + 3876 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:2214]
UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:131]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Hey DazzNoob,

This is a known issue, and we’re working on fixing it now! It is often related to Event Dispatchers, so if you remove any of those from your blueprints it should prevent the crashes. Thanks for the report.

Regards,

Jonathan

Thanks for the reply. Removed the recent added event dispatchers and it appears to be working again :slight_smile: