From 52833f6285b4fd7a710db09aaea77c795a107f8f Mon Sep 17 00:00:00 2001
From: Amanda Ghassaei <amandaghassaei@gmail.com>
Date: Fri, 6 Feb 2015 01:00:51 -0500
Subject: [PATCH] check cell before sending commands

---
 js/models/Lattice.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/js/models/Lattice.js b/js/models/Lattice.js
index 4f89f69b..adf864fb 100644
--- a/js/models/Lattice.js
+++ b/js/models/Lattice.js
@@ -147,7 +147,8 @@ Lattice = Backbone.Model.extend({
 
                 zHeight = Math.floor(zHeight/zScale);
                 for (var z=0;z<zHeight;z++){
-                    cells[x][y][z].destroy();
+                    var cell = cells[x][y][z];
+                    if (cell) cell.destroy();
                     cells[x][y][z] = null;
                 }
             }
-- 
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