diff --git a/src/blackgui/views/aircraftmodelview.cpp b/src/blackgui/views/aircraftmodelview.cpp
index c1030bf83..1390d80a3 100644
--- a/src/blackgui/views/aircraftmodelview.cpp
+++ b/src/blackgui/views/aircraftmodelview.cpp
@@ -289,6 +289,19 @@ namespace BlackGui
             CViewWithDbObjects::customMenu(menu);
         }
 
+        CStatusMessage CAircraftModelView::validateLoadedData(const CAircraftModelList &models) const
+        {
+            static const CStatusMessage ok(this, CStatusMessage::SeverityInfo, "model validation passed", true);
+            if (models.isEmpty()) { return CStatusMessage(this, CStatusMessage::SeverityInfo, "no data", true); }
+            if (this->m_validation == AllowOnlySingeSimulator)
+            {
+                const CSimulatorInfo sim = models.simulatorsSupported();
+                if (sim.isSingleSimulator()) { return ok; }
+                return CStatusMessage(this, CStatusMessage::SeverityError, "data need to be from one simulator");
+            }
+            return CViewWithDbObjects::validateLoadedData(models);
+        }
+
         void CAircraftModelView::ps_toggleHighlightStashedModels()
         {
             bool h = derivedModel()->highlightModelStrings();
diff --git a/src/blackgui/views/aircraftmodelview.h b/src/blackgui/views/aircraftmodelview.h
index b454759b2..888a58ff7 100644
--- a/src/blackgui/views/aircraftmodelview.h
+++ b/src/blackgui/views/aircraftmodelview.h
@@ -28,6 +28,14 @@ namespace BlackGui
             Q_OBJECT
 
         public:
+            //! How to validate loaded JSON data
+            enum LoadValidationFlag
+            {
+                NoValidation,
+                AllowOnlySingeSimulator
+            };
+            Q_DECLARE_FLAGS(LoadValidation, LoadValidationFlag)
+
             //! Constructor
             explicit CAircraftModelView(QWidget *parent = nullptr);
 
@@ -79,6 +87,9 @@ namespace BlackGui
             //! \copydoc BlackGui::Models::CAircraftModelListModel::highlightModelStrings
             bool highlightModelStrings() const;
 
+            //! Load validation
+            void setLoadValidation(LoadValidation validation) { m_validation = validation; }
+
         signals:
             //! Request to stash if applicable
             void requestStash(const BlackMisc::Simulation::CAircraftModelList &models);
@@ -93,8 +104,11 @@ namespace BlackGui
             //! \copydoc QTableView::dropEvent
             virtual void dropEvent(QDropEvent *event) override;
 
-            //! \copydoc CViewBaseNonTemplate::customMenu
+            //! \name View base class overrides
+            //! @{
             virtual void customMenu(QMenu &menu) const override;
+            virtual BlackMisc::CStatusMessage validateLoadedData(const BlackMisc::Simulation::CAircraftModelList &models) const override;
+            //! @}
 
         private slots:
             //! Highlight stashed models
@@ -110,8 +124,14 @@ namespace BlackGui
             void ps_requestStash();
 
         private:
-            bool m_stashingClearsSelection = true; //!< stashing unselects
+            bool           m_stashingClearsSelection = true;         //!< stashing unselects
+            LoadValidation m_validation              = NoValidation; //!< Loaded JSON validation
         };
     } // ns
 } // ns
+
+Q_DECLARE_METATYPE(BlackGui::Views::CAircraftModelView::LoadValidation)
+Q_DECLARE_METATYPE(BlackGui::Views::CAircraftModelView::LoadValidationFlag)
+Q_DECLARE_OPERATORS_FOR_FLAGS(BlackGui::Views::CAircraftModelView::LoadValidation)
+
 #endif // guard
diff --git a/src/blackgui/views/viewbase.cpp b/src/blackgui/views/viewbase.cpp
index 657d9196d..512ce47b8 100644
--- a/src/blackgui/views/viewbase.cpp
+++ b/src/blackgui/views/viewbase.cpp
@@ -955,42 +955,58 @@ namespace BlackGui
             return this->updateContainer(c, sort, resize);
         }
 
+        template <class ModelClass, class ContainerType, class ObjectType>
+        CStatusMessage CViewBase<ModelClass, ContainerType, ObjectType>::modifyLoadedData(ContainerType &data) const
+        {
+            Q_UNUSED(data);
+            static const CStatusMessage e(this, CStatusMessage::SeverityInfo, "no modification", true);
+            return e;
+        }
+
+        template <class ModelClass, class ContainerType, class ObjectType>
+        CStatusMessage CViewBase<ModelClass, ContainerType, ObjectType>::validateLoadedData(const ContainerType &data) const
+        {
+            Q_UNUSED(data);
+            static const CStatusMessage e(this, CStatusMessage::SeverityInfo, "no validation", true);
+            return e;
+        }
+
         template <class ModelClass, class ContainerType, class ObjectType>
         CStatusMessage CViewBase<ModelClass, ContainerType, ObjectType>::ps_loadJson()
         {
-            static const CLogCategoryList cats(CLogCategoryList(this).join({ CLogCategory::validation()}));
             const QString fileName = QFileDialog::getOpenFileName(nullptr,
                                      tr("Load data file"), getDefaultFilename(true),
                                      tr("swift (*.json *.txt)"));
-            if (fileName.isEmpty()) { return CStatusMessage(cats, CStatusMessage::SeverityDebug, "Load canceled"); }
+            if (fileName.isEmpty()) { return CStatusMessage(this, CStatusMessage::SeverityDebug, "Load canceled", true); }
             QString json(CFileUtils::readFileToString(fileName));
             if (json.isEmpty())
             {
-                return CStatusMessage(cats, CStatusMessage::SeverityWarning, "Reading " + fileName + " yields no data");
+                return CStatusMessage(this, CStatusMessage::SeverityWarning, "Reading " + fileName + " yields no data", true);
             }
             ContainerType container;
             container.convertFromJson(json);
+            const CStatusMessage s = this->validateLoadedData(container);
+            if (s.getSeverity() == CStatusMessage::SeverityError) { return s; }
             this->updateContainerMaybeAsync(container);
-            return CStatusMessage(cats, CStatusMessage::SeverityInfo, "Reading " + fileName + " completed");
+            return CStatusMessage(this, CStatusMessage::SeverityInfo, "Reading " + fileName + " completed", true);
         }
 
         template <class ModelClass, class ContainerType, class ObjectType>
         CStatusMessage CViewBase<ModelClass, ContainerType, ObjectType>::ps_saveJson() const
         {
-            static const CLogCategoryList cats(CLogCategoryList(this).join({ CLogCategory::validation()}));
             const QString fileName = QFileDialog::getSaveFileName(nullptr,
                                      tr("Save data file"), getDefaultFilename(false),
                                      tr("swift (*.json *.txt)"));
-            if (fileName.isEmpty()) { return CStatusMessage(cats, CStatusMessage::SeverityDebug, "Save canceled"); }
+            if (fileName.isEmpty()) { return CStatusMessage(this, CStatusMessage::SeverityDebug, "Save canceled", true); }
             const QString json(this->toJsonString());
             bool ok = CFileUtils::writeStringToFileInBackground(json, fileName);
             if (ok)
             {
-                return CStatusMessage(cats, CStatusMessage::SeverityInfo, "Writing " + fileName + " in progress");
+                return CStatusMessage(this, CStatusMessage::SeverityInfo, "Writing " + fileName + " in progress", true);
             }
             else
             {
-                return CStatusMessage(cats, CStatusMessage::SeverityError, "Writing " + fileName + " failed");
+                return CStatusMessage(this, CStatusMessage::SeverityError, "Writing " + fileName + " failed", true);
             }
         }
 
diff --git a/src/blackgui/views/viewbase.h b/src/blackgui/views/viewbase.h
index 1da3b4c5c..c38785384 100644
--- a/src/blackgui/views/viewbase.h
+++ b/src/blackgui/views/viewbase.h
@@ -528,6 +528,12 @@ namespace BlackGui
             //! \copydoc BlackGui::Views::CViewBaseNonTemplate::performUpdateContainer
             virtual int performUpdateContainer(const BlackMisc::CVariant &variant, bool sort, bool resize) override;
 
+            //! Modify JSON data loaded in BlackGui::Views::CViewBaseNonTemplate::ps_loadJson
+            virtual BlackMisc::CStatusMessage modifyLoadedData(ContainerType &data) const;
+
+            //! Verify JSON data loaded in BlackGui::Views::CViewBaseNonTemplate::ps_loadJson
+            virtual BlackMisc::CStatusMessage validateLoadedData(const ContainerType &data) const;
+
             // --------------------------------------------- SLOTS start here -----------------------------------------
 
             //! \copydoc BlackGui::Views::CViewBaseNonTemplate::ps_filterDialogFinished