diff --git a/robots/little_john/telemetry/code/monitor/graph_plotter_rewrite.py b/robots/little_john/telemetry/code/monitor/graph_plotter_rewrite.py
index dff2ded..2092ef3 100755
--- a/robots/little_john/telemetry/code/monitor/graph_plotter_rewrite.py
+++ b/robots/little_john/telemetry/code/monitor/graph_plotter_rewrite.py
@@ -14,14 +14,19 @@ import numpy
 import os
 import platform
 import sys
+import easygui
 from serialselect import selectserial
 
 from colours import *
 
 datafeed = selectserial()
 
-if datafeed == None:
-    print("Exiting...")
+
+if type(datafeed) is str:
+    easygui.msgbox("Failed to open serial port:\n" + datafeed, "Fatal error")
+    sys.exit()
+elif datafeed == None:
+    easygui.msgbox("Failed to open serial port for unknown reason!", "Fatal error")
     sys.exit()
 
 class Series:
--
libgit2 0.21.2