Editor continuously keeps crashing

Development Platform & Builds
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1

Hey there,

I’ve been using UE4 for a while, and it’s never acted up on me like it is right now. Every time I try to edit something in editor, press play, or even try and save – editor stops working and crashes.

What I was doing before it was creating some scripts in blueprint, but even going back and undoing connections doesn’t help fix it. Here’s my latest crash log after trying to save it:

MachineId:6C7D68A84A394FD8242A06858E7D988F
EpicAccountId:fd7844a73a96485a8b563337edb1d48f

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

Assertion failed: TargetDelegate [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp] [Line: 5647]

KERNELBASE + 37901 bytes
UE4Editor_Core + 3140052 bytes
UE4Editor_Core + 1614600 bytes
UE4Editor_Core + 1494994 bytes
UE4Editor_UnrealEd + 9553563 bytes
UE4Editor_Engine + 5109233 bytes
UE4Editor_UnrealEd + 9967079 bytes
UE4Editor_Engine + 9997231 bytes
UE4Editor_CoreUObject + 1525387 bytes
UE4Editor_UnrealEd + 1816217 bytes
UE4Editor_UnrealEd + 2691707 bytes
UE4Editor_UnrealEd + 2679048 bytes
UE4Editor_UnrealEd + 6364224 bytes
UE4Editor_UnrealEd + 3320483 bytes
UE4Editor_UnrealEd + 3315770 bytes
UE4Editor_UnrealEd + 3313428 bytes
UE4Editor_LevelEditor + 578439 bytes
UE4Editor_Slate + 594022 bytes
UE4Editor_Slate + 1551501 bytes
UE4Editor_Slate + 1042839 bytes
UE4Editor_Slate + 1049209 bytes
UE4Editor_Slate + 1450345 bytes
UE4Editor_Slate + 2152010 bytes
UE4Editor_Slate + 2339043 bytes
UE4Editor_Slate + 437180 bytes
UE4Editor_Slate + 162647 bytes
UE4Editor_Slate + 843027 bytes
UE4Editor_Slate + 779190 bytes
UE4Editor_Core + 2485385 bytes
UE4Editor_Core + 2432715 bytes
UE4Editor_Core + 2490430 bytes
UE4Editor_Core + 2422370 bytes
user32 + 105425 bytes
user32 + 104666 bytes
UE4Editor_Core + 3123702 bytes
UE4Editor!FEngineLoop::Tick() + 3641 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2216]
UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:131]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Thanks in advance if anyone knows how to fix this. I just want to keep working. :frowning:

2

I’ve had this (UE4 crashing) happen to me before in a few situations, and my solution was to roll back whatever blueprints I was working on (I’m using Dropbox for some form of source control). If you’re not sure which blueprint is problem, you can binary search it by removing blueprint uassets from Content folder temporarily. If you can’t roll back, you might have to try recreating blueprint again, but stopping short of causing problem second time around!

Hopefully this’ll let you get on with something productive.

3

Hi Syrane,

There is a known issue with event dispatchers causing this crash. Can you verify that you have been using event dispatchers in project?

4

Yes! I just deleted old Event Dispatcher I made to play a matinee sequence through a BP, and everything works again. :smiley:

Thanks for help, !

5

It was something in BP that was crashing engine. Just deleted and recreated Event Dispatcher and voila! It worked again. Thanks for suggestion, man.