Simplify3D User Forum

Hello everyone,
I am trying to print this model: https://www.thingiverse.com/thing:763968/#files

Simplify3D is placing some sort of plaque in the center hole, about halfway through the print: This was sliced with Cura: Looking at the Simplify3D preview, there IS a layer there, somewhere in middle height (not even at the bottom or the top=.

Here is my .factory file: Help!

There's some issues with the mesh. If you run S3D Repair > Non-Manifold check, it will highlight some of these problem spots that are going to cause issues with the slicer. So ideally, you should get the mesh fixed so it's a proper water-tight solid.

Another option might be to run the file through some of the free online repair services like this one: https://netfabb.azurewebsites.net/

Thank you very much, passing the STL through NetFabb fixed it.