diff -r 3abde7651c38 -r 14b40afccd69 controls/PouInstanceVariablesPanel.py
--- a/controls/PouInstanceVariablesPanel.py	Tue Oct 03 16:12:55 2017 +0300
+++ b/controls/PouInstanceVariablesPanel.py	Tue Oct 03 16:31:31 2017 +0300
@@ -113,8 +113,6 @@
             dc.SetBrush(wx.TRANSPARENT_BRUSH)
             dc.SetPen(wx.TRANSPARENT_PEN)
 
-            bg_width = (r_image_w + 4) * len(rightimages) + 4
-            bg_height = r_image_h + 8
             dc.DrawRectangle(images_bbx.x, images_bbx.y,
                              images_bbx.width, images_bbx.height)
             x_pos = images_bbx.x + 4