After a long time of importing, this error occurred.
I don't know the problem.
Has anyone experienced a similar problem?

Hi
Have you seen this discussion on Ureal forums?
https://forums.unrealengine.com/t/fbx-animation-import-error/606154/21

This issue is expected to be resolved in Unreal 5.2 version.

It's going to take quite a long time.

I think we should take the animation to the Unreal Engine in another way.

So I found a way to record directly on the Unreal Engine through a live link.

But the problem is automatically repeated at the end of the animation.

Is there an option to run the animation once and end it?

Currently, the program always loops playback through the region of interest (ROI) if you start within it. If you press "Play" while outside the ROI then it plays till the end of a project (or the beginning when reverse) and then stops. Probably you'll find this suitable for your use case. For instance, you could start one frame before the ROI and cut the rest of the animation beyond the ROI in Unreal.

Thank you for your answer. I think we can do as you say.

I think it's best to take an animation as a live link now.