BLook is unstable:
UE4Editor_FullBodyIKPlugin!UAimTargetComponent::Solve() [c:\shailen\unrealprojects\vrik_4_13\plugins\animation\fullbodyikplugin\source\fullbodyikplugin\private\animation\aimtargetcomponent.cpp:39]
UE4Editor_FullBodyIKPlugin!FBLookSolver::PreSolve_Super() [c:\shailen\unrealprojects\vrik_4_13\plugins\animation\fullbodyikplugin\source\fullbodyikplugin\private\animation\bonecontrollers\blooksolver.cpp:175]
UE4Editor_FullBodyIKPlugin!FBLookSolver::Solve() [c:\shailen\unrealprojects\vrik_4_13\plugins\animation\fullbodyikplugin\source\fullbodyikplugin\private\animation\bonecontrollers\blooksolver.cpp:212]
UE4Editor_FullBodyIKPlugin!FAnimNode_BLook::EvaluateBoneTransforms() [c:\shailen\unrealprojects\vrik_4_13\plugins\animation\fullbodyikplugin\source\fullbodyikplugin\private\animation\bonecontrollers\animnode_blook.cpp:118]
UE4Editor_AnimGraphRuntime
It runs for about 30 seconds or so, then crashes. Disabling the BLook IK allows the rest of BIK to run.