Found multiple root bones error ...

Hi everyone,

I am importing a Blender Skeletal mesh into U4.
I am getting an error: Multiple root bones found.
However there is only one root bone named: Root.
All the other bones have their own names.
Not sure why I see this error never had this problem before.
Any ideas?
I should mention I parented the armature to different objects that are not joined.
That gave me the error so I tried again by first joining all the objects.
But that gave me the same error.
Thank you.

Found the problem.
I had a stray bone sitting outside of the hierarchy.
No name and have no idea how it got there LOL