I am having issues with a component not being sectioned in a section view. The odd thing is that it worked less than 24 hours ago. I have attached two screen shots showing the issue. The building is a multibody part and is not sectioning. I have recreated the view and created the view in a completely new drawing file. I get the same results. The building part will section if it is not in an assembly. Everything sections as expected in the assembly but it will not display properly in the drawing.
SolidWorks 2016 SP3 Windows 10
Did you try to move your section line - I noticed that if there is any ZTG (Zero Tol Geometry) in the cross section, SW will not cut the section correctly.