diff --git a/bin/curvecalc b/bin/curvecalc
--- a/bin/curvecalc
+++ b/bin/curvecalc
@@ -406,7 +406,7 @@ class Main(object):
                     self.curvesetView.live = False
 
                 # mem problem somewhere; need to hold a ref to this
-                self.curvesetView = curveview.Curvesetview(
+                self.curvesetView = curveview.Curvesetview(self.graph, 
                     curvesVBox, zoomControlBox, self.curveset)
                 self.curvesetView._mtimes = mtimes