diff --git a/xos/tosca/resources/xosresource.py b/xos/tosca/resources/xosresource.py
index cc4672b..7a6c194 100644
--- a/xos/tosca/resources/xosresource.py
+++ b/xos/tosca/resources/xosresource.py
@@ -186,7 +186,8 @@
     def create(self):
         xos_args = self.get_xos_args()
         xos_obj = self.xos_model(**xos_args)
-        xos_obj.caller = self.user
+        if self.user:
+            xos_obj.caller = self.user
         xos_obj.save()
 
         self.info("Created %s '%s'" % (self.xos_model.__name__,str(xos_obj)))
diff --git a/xos/tosca/run.py b/xos/tosca/run.py
index 591582b..58dc22b 100644
--- a/xos/tosca/run.py
+++ b/xos/tosca/run.py
@@ -25,7 +25,10 @@
     username = sys.argv[1]
     template_name = sys.argv[2]
 
-    u = User.objects.get(email=username)
+    if username.lower()=="none":
+        u=None
+    else:
+        u = User.objects.get(email=username)
 
     xt = XOSTosca(file(template_name).read(), parent_dir=currentdir, log_to_console=True)
     xt.execute(u)