Cura Not Printing Supports

I am using Cura Lulzbot Edition (17.10) with Lulzbot Mini and having trouble getting Cura to include supports. It is a model of a chair (see attached screenshots and .STL file). I originally printed the chair upright without slicing it. Unfortunately, the fragile nature of the model made it difficult to successfully remove the supports (I had used everywhere setting w raft). In hopes of reducing the amount of supports and making it easier to remove, I sliced the model in half in hopes of printing it on its side and putting two parts together to form the finished chair. There is a small gap from the bed plate. I have tried a number of combinations for supports. The last one was the following:

-Support Type: Everywhere
-Platform adhesion type: Raft

  • The overhang view mode does show it as an overhang

Every time I go to print, it will not print supports for the crossbar that is slightly off the build plate and tries to print in mid-air which obviously is a total mess. I’m assuming there is not a minimum height before Cura will add supports as long as they are needed. I am assuming that the only supports needed in this model would be on the bottom.

I have also downloaded Slic3r to see if I could visualize the supports. When loading it up an choosing supports they don’t show up either. Which made we think it might be the model itself.

Also, should Cura be showing supports in the preview when you choose the layer view? None are shown in this view.

Any insight into how to get the supports/model to print is appreciated.

Thank you,
Brian
Novice at 3D printing
chair part 1.stl (66.9 KB)