Outlines of model disappears in drafting

Hi All

I have attached a .jpg of my problem.

The outlines of my model suddenly disapeared when i entered the drafting application. I have tried checking and unchecking various boxes in the Settings -> General section for a specific view with no positive results.

Furthermore some of the contours of the model are not even present in the view.

I have also tried updating the sheets with no luck.

I run Siemens NX 11.0.1.11

All response is appreciated