In NX CAM Turning if the Turning Geometry geometry has a very small Face, the Part Spun Outline created does not consider this face.
SolutionChanging the Tolerance value of Spun Outline can resolve this issue.
For example if there is a face of 25 micron and it goes undetected in the Spun Outline.
Go to :
Menu > Preference > Manufacturing > Geometry > Spun Outline
Change the tolerance to 0.005 or to a value where you get the desired Result.