Multiprocessing freeze support must be before the parsing command line

code.

gns3server/main.py

@@ -79,6 +79,10 @@ def main():
     Entry point for GNS3 server
     """
 
+    if sys.platform.startswith("win"):
+        # necessary on Windows to freeze the application
+        multiprocessing.freeze_support()
+
     try:
         tornado.options.parse_command_line()
     except (tornado.options.Error, ValueError):
@@ -90,10 +94,6 @@ def main():
         print(__version__)
         raise SystemExit
 
-    if sys.platform.startswith("win"):
-        # necessary on Windows to freeze the application
-        multiprocessing.freeze_support()
-
     current_year = datetime.date.today().year
     print("GNS3 server version {}".format(__version__))
     print("Copyright (c) 2007-{} GNS3 Technologies Inc.".format(current_year))