My 3D print file is being filled in when Cura slices the model: How do I fix this?

[Apple_Juice 0]

So I am currently working on a project. I am trying to replicate the Headpiece to the Staff of Ra from Raiders of the Lost Ark. The file I am using has holes in the center of the file. It is a small disk like shape with a lot of detail. I've printed multiple things like this one before, but this time I added more detail so the file is different. I aline everything to the build plate, but for some reason Cura fills in all the holes in one of the files and cuts off a ton of layers at the top. I have tried changing settings rearanging the two files... but nothing works. Below is the file, could anyone provide me with some help on how to fix this?

 

CE3PRO_Ra_Headpice_Extra_Detail_Bottom.3mf

CE3PRO_Ra_Headpice_Extra_Detail_Bottom.gcode

[gr5 2,210]

What software did you use to edit it?  blender?  sketchup?  Your model has problems - either the normals are wrong (normals tell cura which side of every surface is plastic versus air) (and sketchup and blender are notorious for messing up the normals) or your model is not manifold: https://github.com/Ghostkeeper/SettingsGuide/blob/master/resources/articles/troubleshooting/missing_parts.md#non-manifold-meshes

 

 

Cura has an amazing plugin to test your model to see if something is wrong with it and can repair a very few of the many potential problems:
In the upper right corner of Cura click "marketplace" and make sure you are on the "plugins" tab and install "Mesh Tools".  Then restart Cura.  Now right click on your model, choose "mesh tools" and first choose
"check mesh", then "fix model normals" and "fix simple holes" to see if that helps. 

 

There are also a few tools in Cura to visually show non manifold issues.  For example "x-ray view".  Go to "prepare" view first and then change to xray mode.  Anything red is a problem.