Hey, i am trying to play around with fracture meshes to see what i can use them for. Currently i am simply trying to create fracture meshes with cores, however i keep on getting an error. I have done basic trouble shooting but i am out of ideas.

Every stactic mesh i have tried to use as a core has come up with this error:

The selected static mesh can't be used as a fracture core because its source geometry has been stripped out.
Anyone got any ideas?

Thanks, Alistair