diff --git a/src/View/MainWindow.py b/src/View/MainWindow.py
index 49387884..fed284a7 100644
--- a/src/View/MainWindow.py
+++ b/src/View/MainWindow.py
@@ -41,6 +41,7 @@ no_model_action = [
 model_action = [
     "action_menu_close", "action_menu_edit", "action_menu_save",
     "action_menu_save_as", "action_toolBar_close", "action_toolBar_save",
+    "action_menu_numerical_parameter",
 ]
 
 other_model_action = [
@@ -117,6 +118,7 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             "action_menu_open": self.open_model,
             "action_menu_save": self.save_study,
             "action_menu_save_as": self.save_as_study,
+            "action_menu_numerical_parameter": self.open_solver_parameters,
             "action_run_solver": self.run_solver,
             ## Help
             "action_menu_about": self.open_about,
@@ -125,9 +127,7 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             "action_toolBar_open": self.open_model,
             "action_toolBar_save": self.save_study,
             "action_toolBar_close": self.close_model,
-            "action_toolBar_run_solver": self.open_dummy,
-            "action_toolBar_kill_solver": self.open_dummy,
-            "action_toolBar_listing": self.open_dummy,
+            "action_toolBar_run_solver": self.run_solver,
             ## Current actions
             "action_toolBar_network": self.open_network,
             "action_toolBar_geometry": self.open_geometry,
diff --git a/src/View/Network/GraphWidget.py b/src/View/Network/GraphWidget.py
index 26aa87c2..2569497a 100644
--- a/src/View/Network/GraphWidget.py
+++ b/src/View/Network/GraphWidget.py
@@ -279,6 +279,7 @@ class GraphWidget(QGraphicsView):
         self._selected_item = None
         self._selected_new_edge_src_node = None
         self._current_edge = None
+        self._current_moved_node = None
         self.tmp_line = None
 
         self.node_items = []
@@ -714,15 +715,16 @@ class GraphWidget(QGraphicsView):
         self.clicked = False
 
         if self._state == "move":
-            pos = self.mapToScene(event.pos())
-            self._undo.push(
-                SetNodePosCommand(
-                    self._current_moved_node,
-                    (pos.x(), pos.y()),
-                    (self._mouse_origin_x,
-                     self._mouse_origin_y)
+            if self._current_moved_node is not None:
+                pos = self.mapToScene(event.pos())
+                self._undo.push(
+                    SetNodePosCommand(
+                        self._current_moved_node,
+                        (pos.x(), pos.y()),
+                        (self._mouse_origin_x,
+                         self._mouse_origin_y)
+                    )
                 )
-            )
 
         self.update()
         super(GraphWidget, self).mouseReleaseEvent(event)
diff --git a/src/View/ui/MainWindow.ui b/src/View/ui/MainWindow.ui
index fa4be386..777288fe 100644
--- a/src/View/ui/MainWindow.ui
+++ b/src/View/ui/MainWindow.ui
@@ -151,10 +151,8 @@
     <property name="title">
      <string>&amp;Execute</string>
     </property>
-    <addaction name="action_numerical_parameter_MAGE"/>
+    <addaction name="action_menu_numerical_parameter"/>
     <addaction name="action_run_solver"/>
-    <addaction name="action_stop_solver"/>
-    <addaction name="action_display_listings"/>
     <addaction name="action_simulation_directory_management"/>
     <addaction name="separator"/>
    </widget>
@@ -263,8 +261,6 @@
    <addaction name="action_toolBar_close"/>
    <addaction name="action_toolBar_quit"/>
    <addaction name="action_toolBar_run_solver"/>
-   <addaction name="action_toolBar_kill_solver"/>
-   <addaction name="action_toolBar_listing"/>
    <addaction name="separator"/>
    <addaction name="action_toolBar_network"/>
    <addaction name="action_toolBar_geometry"/>
@@ -298,8 +294,6 @@
    <addaction name="separator"/>
    <addaction name="action_toolBar_sections"/>
    <addaction name="separator"/>
-   <addaction name="action_toolBar_stricklers"/>
-   <addaction name="separator"/>
    <addaction name="action_toolBar_building"/>
    <addaction name="separator"/>
    <addaction name="action_toolBar_initial_cond"/>
@@ -504,9 +498,12 @@
     <string>XYZ</string>
    </property>
   </action>
-  <action name="action_numerical_parameter_MAGE">
+  <action name="action_menu_numerical_parameter">
    <property name="text">
-    <string>Numerical parameter for MAGE solver</string>
+    <string>Numerical parameter for solvers</string>
+   </property>
+   <property name="toolTip">
+    <string>Numerical parameter for solvers</string>
    </property>
   </action>
   <action name="action_boundary_conditions">
@@ -696,7 +693,7 @@
   <action name="action_toolBar_run_solver">
    <property name="icon">
     <iconset>
-     <normaloff>ressources/gtk-execute.png</normaloff>ressources/gtk-execute.png</iconset>
+     <normaloff>ressources/player_play.png</normaloff>ressources/player_play.png</iconset>
    </property>
    <property name="text">
     <string>Run solver</string>
diff --git a/src/config.py b/src/config.py
index 64f5664a..16421b8d 100644
--- a/src/config.py
+++ b/src/config.py
@@ -19,6 +19,8 @@ class Config(SQL):
         self.filename = Config.filename()
         self.set_default_value()
 
+        print(self.filename)
+
         super(Config, self).__init__(filename = self.filename)
 
     def _create(self):
@@ -226,7 +228,14 @@ class Config(SQL):
 
     @classmethod
     def filename(cls):
-        return os.path.expanduser('~') + config_dir + config_file
+        file = ""
+
+        if os.name == 'posix':
+            file = os.path.expanduser('~') + config_dir + config_file
+        else:
+            file = os.path.expanduser('~') + config_file
+
+        return file
 
     @classmethod
     def languages(cls):