Thanks for the reply!
Yes I am using raytracing,
And you are right, once I turn of ray trace and dx12 skeletal animations import perfectly.
However on my test scene ( with raytrace and dx12) I have a new blank scene, no textures and the test I’m doing is importing a box rotating in the z axis.
Just crashes the second I hit play or if I attach the animation to the skeletal mesh.
So as far as I can tell dx12 and raytracing in unreal Is unstable on certain computers.