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src/jflow/workflow.py

@@ -233,16 +233,10 @@ class Workflow(threading.Thread):
                                       choices=param.choices, required=param.required, flag=param.flag, 
                                       group=param.group, display_name=param.display_name)
                 self.__setattr__(param.name, new_param)
-            elif param.__class__ == InputFileList:
-                if args[param.name]:
-                    self.__setattr__(param.name, param.prepare_input_files(args[param.name]))
-                else:
-                    self.__setattr__(param.name, [])
-            elif param.__class__ ==  ParameterList:
-                if args[param.name]:
+            elif param.__class__ == InputFileList and args[param.name]:
+                self.__setattr__(param.name, param.prepare_input_files(args[param.name]))
+            elif param.__class__ ==  ParameterList and args[param.name]:
                     self.__setattr__(param.name, args[param.name])
-                else:
-                    self.__setattr__(param.name, [])
             elif param.__class__ == MultiParameter:
                 sub_args = {}
                 for sarg in args[param.name]: