diff --git a/invesalius/data/measures.py b/invesalius/data/measures.py
index 18b26f4..ccb5856 100644
--- a/invesalius/data/measures.py
+++ b/invesalius/data/measures.py
@@ -835,7 +835,7 @@ class AngularMeasure(object):
         points = []
         for p in self.points:
             coord.SetValue(p)
-            cx, cy = coord.GetComputedDisplayValue(canvas.viewer.slice_data.renderer)
+            cx, cy = coord.GetComputedDisplayValue(canvas.evt_renderer)
             #  canvas.draw_circle((cx, cy), 2.5)
             points.append((cx, cy))
 
diff --git a/invesalius/data/viewer_slice.py b/invesalius/data/viewer_slice.py
index fb5662d..d3fd971 100755
--- a/invesalius/data/viewer_slice.py
+++ b/invesalius/data/viewer_slice.py
@@ -1549,7 +1549,10 @@ class Viewer(wx.Panel):
             self.slice_data.renderer.AddActor(actor)
 
         for (m, mr) in self.measures.get(self.orientation, self.slice_data.number):
-            self.canvas.draw_list.remove(mr)
+            try:
+                self.canvas.draw_list.remove(mr)
+            except ValueError:
+                pass
 
         for (m, mr) in self.measures.get(self.orientation, index):
             if m.visible:
--
libgit2 0.21.2