[More Infill Problems]

I am using Infill to give support to the thin 0.5mm walls. With the settings shown (Infill Line Distance = 8mm).

The fill shows in the first case as below.

 

But in this case it does not?

 

Is it the stl file or the printer settings that is giving the problems?

 

Thanks Sandy

Base Skin (Meshed).stl