I am working on a macro that calculates the perimeter of the face in a selected drawing view and insert it into custom properties.

I am able to select the view but I can't transition into swMeasure.Perimeter. 

I recorded a macro and modified macro to get to swMeasure.Perimeter but it has some issues. I am getting -1 read from perimeter sometimes.

I already made a macro that goes thru all visible parts