Editor crashes when opening custom AI blueprint

Development Programming & Scripting Blueprint
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1

Hello, this is the message I receive when trying to open a specific blueprint in the editor. The offending blueprint is called BasicAI and it crashes each time I try to use it now. Not two days ago it worked just fine before completing work on my Project. Any help would be greatly appreciated.

!Id:e2c1079c85d05872879366c20d1e3a1b

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

Assertion failed: InSCSNode->ComponentTemplate != NULL [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Editor\Kismet\Private\SSCSEditor.cpp] [Line: 3036]

KERNELBASE + 37901 bytes
UE4Editor_Core + 3095148 bytes
UE4Editor_Core + 1661722 bytes
UE4Editor_Core + 1541808 bytes
UE4Editor_Kismet + 2857620 bytes
UE4Editor_Kismet + 3645981 bytes
UE4Editor_Kismet + 2959016 bytes
UE4Editor_Kismet + 487580 bytes
UE4Editor_Kismet + 669128 bytes
UE4Editor_Kismet + 594857 bytes
UE4Editor_Kismet + 1008093 bytes
UE4Editor_Kismet + 1927894 bytes
UE4Editor_AssetTools + 954781 bytes
UE4Editor_UnrealEd + 9805600 bytes
UE4Editor_UnrealEd + 9804590 bytes
UE4Editor_UnrealEd + 9806756 bytes
UE4Editor_UnrealEd + 9800167 bytes
UE4Editor_UnrealEd + 9752398 bytes
UE4Editor_UnrealEd + 9754698 bytes
UE4Editor_Slate + 3412774 bytes
UE4Editor_Slate + 3289361 bytes
UE4Editor_Slate + 2512538 bytes
UE4Editor_Slate + 2748777 bytes
UE4Editor_Slate + 794079 bytes
UE4Editor_Slate + 727433 bytes
UE4Editor_Core + 2503749 bytes
UE4Editor_Core + 2422753 bytes
UE4Editor_Core + 2508174 bytes
UE4Editor_Core + 2410066 bytes
user32 + 105425 bytes
user32 + 104666 bytes
UE4Editor_Core + 2509366 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

From my experience, it is not a problem with your blueprint. I had the same problem and even after I rolled back to the previous working revision, this error still occurs.

I “fixed” it by rebuilding the solution and running it from C++ side. The blueprint still crushes if you open it from Unreal client, but if you use VS to launch it then it is fine.