Bugfix, The value None was being set instead of an empty string when no

environment variables are defined.

site_ansto/instrument/runsics.py

@@ -47,7 +47,7 @@ def start_cmd(server, args):
     else:
         soffset = ''
     sicsenv = {
-        'none':       None,
+        'none':       '',
         'fullsim':   'SICS_SIMULATION=full%s' % soffset,
         'fakedev':   'SICS_SIMULATION=fakedev%s' % soffset,
         'scriptval': 'SICS_SIMULATION=script_validator%s' % soffset