Repeated crashes working in the sequencer

My suspicion is that several actors (Static Mesh and multiple cameras) are attached to a Cube (PlayerVehicleRoot) which is attached and animated to a Camera Rig Rail (PlayerRig_Rail). Then half way through the sequence this Cube is animated by itself and goes relatively far from the Camera Rig Rail.

If this is indeed the reason for the crashes, would greatly appreciate a work around or any recommendation to prevent the crashes from happening.

Please let me know if you need further information or different files.

Regards,

Dom

Steps to Reproduce
Hi There,

I am experiencing consistent and repeated crashes while working in the Sequencer. It feels like I can only select/edit a small number of actors before Unreal crashes. The only way that I found around this issue is to save almost after every single action/manipulation.

The environment is very strait forward as I am using the Game Animation Sample with geometry built in the engine, no particular plugins nor custom game features. Only few models have been imported from Blender.

I am only animating hard surface models and UE objects (Static Mesh, Cube, Camera and Camera Rig Rail), no characters.

Hello Dom,

The callstack looks to be similar to the one in this post:

https://forums.unrealengine.com/t/help-crashes-assertation-failed-uniform-buffer-etc/2140967/40

I believe your 5.5 version is 5.5.3? Can you try upgrading to the last hotfix? 5.5.4?

Or, if you are building from source, this is the changelist that should fix the crash:

https://github.com/EpicGames/UnrealEngine/commit/bee3551cc2942b82482f2023226b60fc2b0fb9f6

Hey Max,

Thank you for your timely reply.

Didn’t spent a whole lot of time testing it but at least so far I haven’t experienced any crash.

So it seems like updating to 5.5.4 fixed the issue.

Thank you very much for your support.