diff --git a/script/LedDetection.py b/script/LedDetection.py
index e8b19de..c961510 100644
--- a/script/LedDetection.py
+++ b/script/LedDetection.py
@@ -42,12 +42,12 @@ def detect_led(ip):
             , maxCirc = 1.0)
     r=results
 
-    print rt.getColumnHeadings()
-    for row in range (rt.counter):
+    print r.getColumnHeadings()
+    for row in range (r.counter):
         if in_roi(r.getValue("XM",row), r.getValue("YM",row)):
-            print rt.getRowAsString(row)    
+            print r.getRowAsString(row)    
         else:
-            print >> sys.stderr, 'Invalid location:' + str(r.getValue("XM", row), r.getValue("YM", row)
+            print >> sys.stderr, 'Invalid location:' + str(r.getValue("XM", row)) + ", "  + str( r.getValue("YM", row))
                 
     return (results,output)