cura slicing issue

[lance-greene 7]

so im trying to print a part for a friend, but the part that is supposed to be solid is considered a hollow nothing by cura, and the part that should be just a hole is being seen as an internal part of the print when in layer view for some reason, whats wrong? i tried putting it through netfabb but all netfabb did was close the hole in the middle and make the entire thing a solid part

[peggyb 171]

check the xray view, and you will probably see some red walls... and that means back to the drawing program (SketchUp??) and redo the walls shown in red. Red means that there are sufaces that are not closed/single, are not a solid.