diff --git a/script/local.py b/script/local.py
index 4d92fd4..ef9daac 100644
--- a/script/local.py
+++ b/script/local.py
@@ -149,6 +149,7 @@ def plot_file(file_name, title = None):
 
 class Listener(ControllerListener):
     def onControllerStateChanged(self, state, former):
+        global FILENAME
         if former == State.Busy:
             FILENAME = None
 controller.addListener(Listener())    #Old listeners are cleande in startup
@@ -346,6 +347,7 @@ def wait_inj (value, delay=0.5):
 def set_file(file_name):
     """
     """
+    global FILENAME
     FILENAME = file_name
 
 class pol_mod(Readable):