Description

Crash when clicking on a "Two Bone IK" node in an Animation Blueprint

Crash Reporter currently down, see callstack section.

Log and dmp are attached

Steps to Reproduce

1. Open Content Examples
2. Find the Owen_IKAnimBlueprint
3. Open it
4. Click on either of the "Two Bone IK" nodes

Result: Crash after a long freeze

Callstack

MachineId:BD5F477946ABC86E1167AEA503FBEFCC
EpicAccountId:6d468bd698bf4242961863e231283591

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

Assertion failed: ResultString.Num() == 3 [Link Removed] [Line: 298]

KERNELBASE + 37901 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() + 248 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() + 1079 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor_AnimGraph!UAnimGraphNode_SkeletalControlBase::GetDefaultValue() + 428 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\animgraph\private\animgraphnode_skeletalcontrolbase.cpp:298]
UE4Editor_AnimGraph!UAnimGraphNode_TwoBoneIK::CopyNodeDataTo() + 133 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\animgraph\private\animgraphnode_twoboneik.cpp:122]
UE4Editor_Persona!FAnimationViewportClient::FindSelectedAnimGraphNode() + 1098 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\persona\private\animationeditorviewportclient.cpp:674]
UE4Editor_Persona!FAnimationViewportClient::Tick() + 665 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\persona\private\animationeditorviewportclient.cpp:805]
UE4Editor_UnrealEd!UEditorEngine::Tick() + 6478 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editor.cpp:1389]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() + 22 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedengine.cpp:347]
UE4Editor!FEngineLoop::Tick() + 4179 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2257]
UE4Editor!GuardedMain() + 1404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
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]

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Fixed
ComponentGameplay - Blueprint
Affects Versions4.7.14.7.2
Target Fix4.7.3
Fix Commit2471588
CreatedMar 5, 2015
ResolvedMar 6, 2015
UpdatedApr 27, 2018