diff --git a/system/workflow.py b/system/workflow.py
index 37f3182..d406007 100644
--- a/system/workflow.py
+++ b/system/workflow.py
@@ -177,10 +177,11 @@ class WorkflowView (gtk.VBox):
         
         argcount =function.run.func_code.co_argcount - 1
         
-        if  argcount != len(parent_data):
+        if  argcount != len(parent_data) and argcount != 0:
             logger.log('warning','Method requires ' + str(argcount) + ' Data. ' + str(len(parent_data)) + ' selected')
             return
-        if not project.current_data:
+
+        if not project.current_data or argcount == 0:
             new_data = function.run()
         else:
             new_data = function.run(*project.current_data)