holes in model when sliced

ruggb

I am trying to print a somewhat difficult model (IMHO).

When I slice it with sli3r or cura it creates holes in the wall of the model.

The wall is not the thinnest part. The hole positions r not the same for either slicer.

I did not print this, I am only looking at the layer structure in Repetier.

I tried changing the layer thickness (0.1, 0.2, 0.4) and the holes r still there but maybe in differnet spots.

I have a 0.4mm nozzle and 1.75mm filament.

Why is this doing this??

Repetier

I guess apicture would help here. Never seen holes where not expected. Depeding on your settings you can see past filament preview (width not set right in preview), but that would not affect the print it self.