diff --git a/script/Alignment/Gun_solenoid_alignment.py b/script/Alignment/Gun_solenoid_alignment.py
index d93b097..a959c6e 100755
--- a/script/Alignment/Gun_solenoid_alignment.py
+++ b/script/Alignment/Gun_solenoid_alignment.py
@@ -126,9 +126,9 @@ finally:
 # take the result of the scan and do the plots
 #p = plot(r.getReadable(1), xdata=r.getReadable(0), title = "Centroid excursion")[0]
 #hull=add_convex_hull_plot ("Centroid excursion", r.getReadable(0),r.getReadable(1), plot_name, False, (0,cam_img._width), (0,cam_img._height))
-if add_convex_hull_plot:
+if centroid_excursion_plot:
     (hx,hy)=add_convex_hull_plot ("Centroid excursion", r.getReadable(0),r.getReadable(1), plot_name)
-else: 
+else:   
     (hx,hy)= convex_hull(x=r.getReadable(0), y=r.getReadable(1))
     hx.append(hx[0]); hy.append(hy[0])