Infill in embedded holes

[ONEinsanePHReaK 0]

Hello I'm having a problem where Cura wants to add infill inside of the holes I've added for imbedded magnets. Does anyone know a work around for this? 
I've attached an image of the issue as well as my STLPuck.stl. Thanks for the help!

[tinkergnome 927]

The "bugs" are probably in the stl file.

Here are all mesh errors marked with a pin (you can check it with Meshmixer).

 

 

It seems like there are already "magnets" positioned in each hole. There's the "puck" (with 6 holes) and 6 "magnets" in the file - (overlapping the holes) - 13 distinct shells in sum. So... remove all the extra geometry and it should slice fine with Cura:

 

Puck_with_magnet_holes.stl

 

 

Good luck!