UCX not generating when importing as Skeletal Mesh.

Hi!
Skeletal Mesh cannot contain UCX. Collision mesh need only for non Skeletal mesh. For Skeletal Mesh you need generate Phisycal Asset (automatic when importing the object or manualy after import).
Read this docs…
https://docs.unrealengine/latest/INT/Engine/Content/FBX/SkeletalMeshes/index.html