debug rubar

src/Solver/CommandLine.py

@@ -99,7 +99,10 @@ class CommandLineSolver(AbstractSolver):
         params = study.river.get_params(self.type)
         args = params.get_by_key("all_command_line_arguments")
 
-        return args.split(" ")
+        if args is None:
+            return []
+        else:
+            return args.split(" ")
 
     def input_param(self):
         """Return input command line parameter(s)