SolverParameters: Forbidden duplicate window.

src/View/MainWindow.py

@@ -540,11 +540,19 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             self.msg_select_reach()
 
     def open_solver_parameters(self):
-        params = SolverParametersWindow(
-            study = self.model,
-            parent = self
+        params = self.sub_win_filter_first(
+            "Solver parameters",
+            contain = []
         )
-        params.show()
+
+        if params is None:
+            params = SolverParametersWindow(
+                study = self.model,
+                parent = self
+            )
+            params.show()
+        else:
+            params.activateWindow()
 
     def run_solver(self):
         if self.model is None: