Importing UE4 Mesh wrong

Development Asset Creation
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1

Ihave make a Building, with different Meshes inside. The Size of that, is 8MB.(FBX)
If i import it on UE4, a error comes and on the errorlines it this text to see:

48198-ckxz9fl.png
48198-ckxz9fl.png783×47 2.54 KB

2

I really, need help. Its important for me to finish that.