diff --git a/plotter.py b/plotter.py
index 52b196c..3189e4a 100644
--- a/plotter.py
+++ b/plotter.py
@@ -206,17 +206,28 @@ class Plotter(Aggregator, BaseProcessor):
             )
 
             for param in ramses.input_parameters:
+                value = None
                 try:
-                    param_setting = ParameterSetting(
-                        input_param=param,
-                        value=self.comp.get_nml(param.key, run),
-                        visibility=ParameterVisibility.BASIC_DISPLAY,
-                    )
-                    simu.parameter_settings.add(param_setting)
+                    value = self.comp.get_nml(param.key, run)
                 except KeyError as e:
                     self._log("key {} not found".format(e), "WARNING")
-                except AttributeError as e:
-                    self._log("{}".format(e), "WARNING")
+
+                if value is not None:
+                    try:
+                        param_setting = ParameterSetting(
+                            input_param=param,
+                            value=value,
+                            visibility=ParameterVisibility.BASIC_DISPLAY,
+                        )
+                        simu.parameter_settings.add(param_setting)
+
+                    except AttributeError:
+                        param_setting = ParameterSetting(
+                            input_param=param,
+                            value=str(value),
+                            visibility=ParameterVisibility.BASIC_DISPLAY,
+                        )
+                        simu.parameter_settings.add(param_setting)
 
             self.simulations[run] = simu