When I try to open a project in Mendix 5.x it crashes. It gives the error: Something went wrong in the modeler.. The following error is in the stacktrace: Mendix.Modeler.Utility.Progress.ProgressException ---> System.InvalidOperationException: Opening the original project file failed. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Mendix.Modeler.Integration.ConvertImportChoicePath.FindElementByRuntimePath(IElement element, IElementPath runtimePath) in c:\jenkins\workspace\AppStudio-Integration-Modeler\src\modeler\Mendix.Modeler.Integration\Conversions\ConvertImportChoicePath.cs:line 51 at Mendix.Modeler.Integration.ConvertImportChoicePath.UpdatePath(IMappingDocument importMapping, IMappingElement mappingElement) in c:\jenkins\workspace\AppStudio-Integration-Modeler\src\modeler\Mendix.Modeler.Integration\Conversions\ConvertImportChoicePath.cs:line 37 at Mendix.Modeler.Integration.ConvertImportChoicePath.ConvertPaths(ImportMapping importMapping) in c:\jenkins\workspace\AppStudio-Integration-Modeler\src\modeler\Mendix.Modeler.Integration\Conversions\ConvertImportChoicePath.cs:line 30 at Mendix.Modeler.Integration.ConvertImportChoicePath.Convert(IProject project) in c:\jenkins\workspace\AppStudio-Integration-Modeler\src\modeler\Mendix.Modeler.Integration\Conversions\ConvertImportChoicePath.cs:line 23 at Mendix.Modeler.Projects.Conversions.ProjectConversion.PerformOneTimeConversion(IOneTimeConversion oneTimeConversion) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Projects\Conversions\ProjectConversion.cs:line 56 at Mendix.Modeler.Projects.Conversions.ProjectConversion.DoOneTimeConversions() in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Projects\Conversions\ProjectConversion.cs:line 41 at Mendix.Modeler.Projects.Project.<convert>b0() in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Projects\Project.cs:line 322 at Mendix.Modeler.Projects.Project.HackProjectInstanceT in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Storage\Operations\TypeWalk.cs:line 87 at Mendix.Modeler.Storage.Operations.UnitLoader.IsConversionNeeded(IStorageUnit rootUnit) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Storage\Operations\UnitLoader.cs:line 233 at Mendix.Modeler.Storage.Operations.UnitLoader.LoadT in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Utility\DbConnectors\DbConnector.cs:line 64 at Mendix.Modeler.Utility.DbConnectors.SQLiteConnector.DoTResult in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Storage\Database.cs:line 163 at Mendix.Modeler.Operations.Loader30.DoLoad(IProgressInfo info, String filePath) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Operations\Loader30.cs:line 17 --- End of inner exception stack trace --- at Mendix.Modeler.VersionControl.RevProjectBaseFileCache.ConvertBaseFileIfPossible(IProgressInfo info, Int64 desiredRevision) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\VersionControl\RevProjectBaseFileCache.cs:line 81 at Mendix.Modeler.Main.ProjectFileOpener.<addconvertprojectbasefilestep>b1(IProgressInfo info) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Main\ProjectFileOpener.cs:line 108 at Mendix.Modeler.Utility.Progress.ProcessRunner.worker_DoWork(Object sender, DoWorkEventArgs e) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.UIFramework\Progress\ProcessRunner.cs:line 66 at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument) --- End of inner exception stack trace --- at Mendix.Modeler.Utility.Progress.ProcessRunner.Run() in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.UIFramework\Progress\ProcessRunner.cs:line 49 at Mendix.Modeler.Main.ProjectFileOpener.DoOpenProject() in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Main\ProjectFileOpener.cs:line 90 at Mendix.Modeler.Main.ProjectFileOpener.OpenProject() in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\Main\ProjectFileOpener.cs:line 64 at Mendix.Modeler.VersionControl.RevCheckouter.DoCheckout(IRevLocation checkoutLocation, String projectDirectory) in c:\jenkins\workspace\AppStudio-Modeler\src\Mendix.Modeler.Core\VersionControl\RevCheckouter.cs:line 45 at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e) at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e) at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e) at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea) at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ToolStrip.WndProc(Message& m) at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) Hope you guys can help me. Already tried to install the modeler again and tried to download the project again. Nothing helped. Thanks in advance! Mark