Help with my T-rex

Hi all, i have modeled rigged and animated a t-rex, it works perfectly in any other game engine but when i import it inot unreal engine 4 i get a load of warnings about missing vertices influences, any ideas on how i can fix it? it works fine in unity engine and cryengine so im at a loss as to what the problem might be…

If you are using Maya, check out this thread: