diff -r 6923074540dd -r dbc065a2f7a5 controls/DebugVariablePanel/DebugVariableGraphicViewer.py
--- a/controls/DebugVariablePanel/DebugVariableGraphicViewer.py	Thu Oct 04 11:25:42 2018 +0300
+++ b/controls/DebugVariablePanel/DebugVariableGraphicViewer.py	Thu Oct 04 12:07:16 2018 +0300
@@ -36,6 +36,7 @@
 from matplotlib.backends.backend_wxagg import _convert_agg_to_wx_bitmap
 from matplotlib.backends.backend_agg import FigureCanvasAgg
 from mpl_toolkits.mplot3d import Axes3D
+from six.moves import xrange
 
 from editors.DebugViewer import REFRESH_PERIOD
 from controls.DebugVariablePanel.DebugVariableViewer import *