Wall Core Line appears in window sections

[ryan.87191]

Revit 8.1 - I am cutting Building Sections and when it cuts through a window It shows a line in the center of the wall only in the area of the window. I can't change it with the Linework tool and it appears regardless of wich window I use. It does highlight when I select the wall. How do I make it desappear?

Thanks,
Ryan

[dhurtubise]

Could it be the analytical model line ?

[ryan.87191]

I don't know. The wall is Non-Bearing. If it is how would I turn it off?