diff --git a/src/Mod/Fem/femtaskpanels/task_solver_ccxtools.py b/src/Mod/Fem/femtaskpanels/task_solver_ccxtools.py
index 28131f118a..6a32bd8c2f 100644
--- a/src/Mod/Fem/femtaskpanels/task_solver_ccxtools.py
+++ b/src/Mod/Fem/femtaskpanels/task_solver_ccxtools.py
@@ -98,16 +98,18 @@ class _TaskPanel:
             QtCore.SIGNAL("clicked()"),
             self.editCalculixInputFile
         )
-        QtCore.QObject.connect(
-            self.form.pb_run_ccx,
-            QtCore.SIGNAL("clicked()"),
-            self.runCalculix
-        )
+        # connect stopCalculix before runCalculix
+        # see https://github.com/FreeCAD/FreeCAD/issues/12448
         QtCore.QObject.connect(
             self.form.pb_run_ccx,
             QtCore.SIGNAL("clicked()"),
             self.stopCalculix
         )
+        QtCore.QObject.connect(
+            self.form.pb_run_ccx,
+            QtCore.SIGNAL("clicked()"),
+            self.runCalculix
+        )
         QtCore.QObject.connect(
             self.form.rb_static_analysis,
             QtCore.SIGNAL("clicked()"),