diff --git a/static/js/data.js b/static/js/data.js
index 32a0b5d7..99c80ac9 100644
--- a/static/js/data.js
+++ b/static/js/data.js
@@ -169,7 +169,7 @@ class dataFileBase {
       }
 
       var start = new state(parseInt(vals[0], 10), parseInt(vals[1], 10), vals[2]);
-      var end = new state(parseInt(vals[3], 10), vals[4], vals[5]);
+      var end = new state(parseInt(vals[3], 10), parseInt(vals[4],10), vals[5]);
       var ex = new excitationValue(start, end, parseFloat(vals[6], 10));
       dat.excitations.push(ex);
     };