Ensure condition failed: !DoesContainTransformCurves()

I’m having a packaging error that I’m not sure how to track down.

Here’s what I thought was the most relevant error message:

UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogOutputDevice: Error: Ensure condition failed: !DoesContainTransformCurves() || (RawAnimationData.Num()==0 || SourceRawAnimationData.Num() != 0) [File:D:\Build++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Engine\Private\Animation\AnimSequence.cpp] [Line: 379]
UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogOutputDevice: Error: Stack:
UATHelper: Packaging (Windows (64-bit)): LogInit: Display: LogOutputDevice: Error: [Callstack]

So after a day of ripping things apart, it seems that an animation curve added to a skel mesh was the cause of the problem. I deleted the additive curves we used to modifiy animation and the project cooked and packaged properly.

Is there any known bug with adding additive curves to skeletal animations to modify the anim?

Getting this same issue, +1.

I’m having this same issue, but I need to my animations with the layered curves, is there a way to fix this?