Modular Crashes while opening a project in Mendix 9.3

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Mendix.Modeler.Utility.Progress.ProgressException ---> System.NullReferenceException: Object reference not set to an instance of an object.    at Mendix.Modeler.WebUI.Forms.Widgets.EntityWidgets.ListViews.ListView.HasListViewControls(IDocument document) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI\Forms\Widgets\EntityWidgets\ListViews\ListView.cs:line 126    at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)    at Mendix.Modeler.WebUI.Forms.Widgets.EntityWidgets.ListViews.ListView.Mendix.Modeler.Projects.IPostprocess.Postprocess() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI\Forms\Widgets\EntityWidgets\ListViews\ListView.cs:line 123    at Mendix.Modeler.Projects.Postprocessor.<>c.<Postprocess>b__0_0(IPostprocess obj) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Projects\Postprocessor.cs:line 14    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 88    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Storage.Operations.TypeWalk.ForEachObjectDo(IStorageObject root, Func`2 work, Boolean skipExcludedObjects) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 92    at Mendix.Modeler.Projects.ProjectUtil.PostprocessProject(IProject project) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Projects\ProjectUtil.cs:line 30    at Mendix.Modeler.ProjectHandling.Openers.ProjectFileOpenerUI.<AddInitializeProjectStep>b__49_0(IProgressInfo info) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.ProjectHandling\Openers\ProjectFileOpenerUI.cs:line 424    at Mendix.Modeler.UIFramework.Progress.ProcessRunner.RunStep(Step step) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Progress\ProcessRunner.cs:line 101    at Mendix.Modeler.UIFramework.Progress.ProcessRunner.OnDoWork(Object sender, DoWorkEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Progress\ProcessRunner.cs:line 74    at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)    at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)    --- End of inner exception stack trace ---    at Mendix.Modeler.UIFramework.Progress.ProcessRunner.Run() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Progress\ProcessRunner.cs:line 52    at Mendix.Modeler.ProjectHandling.Openers.ProjectFileOpenerUI.DoOpenProject() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.ProjectHandling\Openers\ProjectFileOpenerUI.cs:line 177    at Mendix.Modeler.ProjectHandling.Openers.ProjectFileOpenerUI.OpenProject() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.ProjectHandling\Openers\ProjectFileOpenerUI.cs:line 152    at Mendix.Modeler.ProjectHandling.Openers.ProjectOpenerUI.DoOpenProject(OpenAppData openAppData) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.ProjectHandling\Openers\ProjectOpenerUI.cs:line 115    at Mendix.Modeler.ProjectHandling.Openers.ProjectOpenerUI.SelectAndOpenProject() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.ProjectHandling\Openers\ProjectOpenerUI.cs:line 105    at Eto.Forms.Command.OnExecuted(EventArgs e)    at Eto.Forms.Command.System.Windows.Input.ICommand.Execute(Object parameter)    at Eto.Forms.MenuItem.OnClick(EventArgs e)    at Eto.Forms.MenuItem.Callback.OnClick(MenuItem widget, EventArgs e)    at Eto.Wpf.Forms.Menu.MenuItemHandler`3.OnClick()    at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)    at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)    at System.Windows.Controls.MenuItem.InvokeClickAfterRender(Object arg)    at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)    at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
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1 answers
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Which mendix version is your project on right now? If you're trying to upgrade from Mendix 8, be sure to follow the steps listed here in the documentation. Sometimes it can also help to upgrade to the first available version of Mendix 9 before upgrading to the most recent version.

answered