Suddenly after a week on holiday my solid hatch is not showing on pdf print, I am using my usual drawing template although I did insert a clients drawing into this, perhaps some of the clients settings have been imposed on my drawing.  

Other pattern hatches are showing, I have adjusted transparency from 0 to alot but still nothing, I tried different colours and layers still nothing on the pdf print though the hatches are fully visible in model and paper space.

Any help is appreciated