Subsurface Causing Mesh Problems Just started using blender, and naturally the first thing I'm making is a minigun. It looks dope.

Problem is, when I applied the subsurface modifier, I ran into a problem.


And without it...
Nothing.
Any help is greatly appreciated.
Heres the link to the .blend files: https://www.mediafire.com/?1iq489br01zej02

Edit: It can be somewhat fixed by changing the number of subdivisions, but this makes it WAY to high quality.
I downloaded the model and found your problem. You've got hundreds or vertices on top of each other.



What you want to do is select everything live I've done and press W to open the specials menu and press "Remove doubles".



As you can see, you've lost all your sharpness in your mesh. You we're probably extruding faces to make these infinitely thin ones that gave you sharp edges, but there's a better way.

What you want to do when you find an edge you want to sharpen it select it and by pressing Ctrl+E to go into edge crease mode and sharpen edges by pulling your cursor from the edge's origin.


Here you can see I hot a little too excited and did a bunch of edges.