5.2 Crashes every time I open an IKRig

Development Character & Animation
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1

I just upgraded my project from 5.1.1 to 5.2. I tried to use an existing retargeter to retarget an animation from one of my characters to another (this worked fine in 5.1). In 5.2, it caused an immediate crash.
Then I opened a retargeter to see if something was amiss. The source skeleton was missing and when I tried to select it again, it caused a crash.
Trying to open any IK Rig causes a crash. I have IK and virtual bones in my skeletons, could that be causing the issue?

Can someone suggest something I can do to fix this?

The crash log tells me nothing:
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000

UnrealEditor_IKRig
UnrealEditor_IKRig
UnrealEditor_IKRig
UnrealEditor_IKRig
UnrealEditor_IKRigEditor
UnrealEditor_IKRigEditor
UnrealEditor_IKRigEditor

2

Hey there @ve11ocet! Welcome to the community! A memory access violation pointing back to IKRig could be specific to that skeleton or system. Does this occur with the default mannequin skeletons or other skeletons without virtual bones?

Alternatively you can check the full error itself and see exactly what it’s trying to access by making sure you have debug symbols installed in the Epic Games Launcher → 5.2 → Options → Debugging Symbols and cause the crash again and retrieve the logs from the crash folder in your project.