Why Right Side walls are Invisible

[layneruley]

There are two views shown in the image. Both views are exists in a Single Revit 2009 Project.
The Left view is Roof Floor plan View & Right view is First Floor plan view.

The walls are drawn in the First Floor Plan view.

But notice that the three walls shown in the Roof Floor Plan view are invisible. Why these are invisible? . I checked View Template settings, Graphics Override settings but could not trace out that why these three walls are invisible. Please tell that why only three walls are invisible & others are visible.??

[Dimitri Harvalias]

Check the height of the walls. Do they fall within the view range of the roof plan?

[layneruley]

Thanks, But why View Depth settings are applied to only three particular walls and not to the adjacent remaining walls at the same time?

[Dimitri Harvalias]

View depth settings apply to the view. I was suggesting that the walls that don't appear might be lower (shorter) than the other walls and therefore might not appear in the roof plan view.