=== modified file 'UbuntuSystemService/backend.py'
--- UbuntuSystemService/backend.py	2015-04-15 12:18:32 +0000
+++ UbuntuSystemService/backend.py	2017-12-30 13:55:23 +0000
@@ -284,7 +284,7 @@
         
         # set (or reset)
         if new_no_proxy == "" or new_no_proxy is None:
-            res = self._clear_no_proxy()
+            res = self._clear_etc_environment_no_proxy()
         else:
             res = self._write_etc_environment_no_proxy(new_no_proxy)
         return res