How to solve startupFcn issue?

I have been trying to use the App Designer feature in Matlab. A portion of my code is below:

% Code that executes after component creation
        function startupFcn(app, varargin)
            % Configure image axes
            app.ImageAxes.Visible = 'off';
            app.ImageAxes.Colormap = gray(256);
            axis(app.ImageAxes, 'image');
            
             % Construct app
        function app = Patient(varargin)

            % Create UIFigure and components
            createComponents(app)

            % Register the app with App Designer
            registerApp(app, app.UIFigure)

            % Execute the startup function
            runStartupFcn(app, @(app)startupFcn(app, varargin{:}))

            if nargout == 0
                clear app
            end
        end

Despite running the code multiple times, I get the above error message repeatedly. Any help would be appreciated. Thank you.

[Debasish Samal]

Can you share the entire code?

[Warid Islam]

classdef Patient < matlab.apps.AppBase

    % Properties that correspond to app components
    properties (Access = public)
        UIFigure                        matlab.ui.Figure
        ImageAxes_2                     matlab.ui.control.UIAxes
        BrainViewButton                 matlab.ui.control.Button
        BloodViewButton                 matlab.ui.control.Button
        VentriclesViewButton            matlab.ui.control.Button
        TissueViewButton                matlab.ui.control.Button
        InfoPanel                       matlab.ui.container.Panel
        PatientNameLabel_2              matlab.ui.control.Label
        PatientNameEditField            matlab.ui.control.EditField
        OptionPanel                     matlab.ui.container.Panel
        OpenButton                      matlab.ui.control.Button
        FlipButton                      matlab.ui.control.Button
        RunButton                       matlab.ui.control.Button
        EditingPanel                    matlab.ui.container.Panel
        CorrectionButton                matlab.ui.control.Button
        CleaningToolForBloodButton      matlab.ui.control.Button
        CleaningToolforVentriclesButton  matlab.ui.control.Button
        CleaningToolforCalcificationButton  matlab.ui.control.Button
        MorphologicalOperationsButton   matlab.ui.control.Button
        UndoButton                      matlab.ui.control.Button
        BloodToolButton                 matlab.ui.control.Button
        DeleteButton                    matlab.ui.control.Button
        AnalyzePanel                    matlab.ui.container.Panel
        CreateBoundaryButton            matlab.ui.control.Button
        SAHButton                       matlab.ui.control.Button
        ICHButton                       matlab.ui.control.Button
        SDHButton                       matlab.ui.control.Button
        IVHButton                       matlab.ui.control.Button
        DataPanel                       matlab.ui.container.Panel
        AddExplanationButton            matlab.ui.control.Button
        ExportDataButton                matlab.ui.control.Button
        OpenResultsButton               matlab.ui.control.Button
        StartBrainSliceButton           matlab.ui.control.Button
        EditField                       matlab.ui.control.EditField
        FullBrainSliceButton            matlab.ui.control.Button
        EditField_2                     matlab.ui.control.EditField
        ComputationPanel                matlab.ui.container.Panel
        AllSlicesPanel                  matlab.ui.container.Panel
        BrainVolumeEditFieldLabel       matlab.ui.control.Label
        BrainVolumeEditField            matlab.ui.control.EditField
        BloodVolumeEditFieldLabel       matlab.ui.control.Label
        BloodVolumeEditField            matlab.ui.control.EditField
        VentriclesVolumeEditFieldLabel  matlab.ui.control.Label
        VentriclesVolumeEditField       matlab.ui.control.EditField
        TissueVolumeEditFieldLabel      matlab.ui.control.Label
        TissueVolumeEditField           matlab.ui.control.EditField
        BloodStatsPanel                 matlab.ui.container.Panel
        SAHEditFieldLabel               matlab.ui.control.Label
        SAHEditField                    matlab.ui.control.EditField
        ICHEditFieldLabel               matlab.ui.control.Label
        ICHEditField                    matlab.ui.control.EditField
        SDHEditFieldLabel               matlab.ui.control.Label
        SDHEditField                    matlab.ui.control.EditField
        IVHEditFieldLabel               matlab.ui.control.Label
        IVHEditField                    matlab.ui.control.EditField
        CurrentSlicePanel               matlab.ui.container.Panel
        BloodStatsPanel_2               matlab.ui.container.Panel
        SAHEditField_2Label             matlab.ui.control.Label
        SAHEditField_2                  matlab.ui.control.EditField
        ICHEditField_2Label             matlab.ui.control.Label
        ICHEditField_2                  matlab.ui.control.EditField
        SDHEditField_2Label             matlab.ui.control.Label
        SDHEditField_2                  matlab.ui.control.EditField
        IVHLabel                        matlab.ui.control.Label
        IVHEditField_2                  matlab.ui.control.EditField
        EditField_9                     matlab.ui.control.EditField
        EditField_10                    matlab.ui.control.EditField
        EditField_11                    matlab.ui.control.EditField
        EditField_12                    matlab.ui.control.EditField
        CreateBoundaryStatsPanel        matlab.ui.container.Panel
        EditField_3                     matlab.ui.control.EditField
        EditField_4                     matlab.ui.control.EditField
        EditField_5                     matlab.ui.control.EditField
        EditField_6                     matlab.ui.control.EditField
        BrainDemoLabel                  matlab.ui.control.Label
        ImageAxes_3                     matlab.ui.control.UIAxes
    end

    
   
    
  
        
        function updateimage(app,imagefile)
            
            % For corn.tif, read the second image in the file
            if strcmp(imagefile,'corn.tif')
                im = imread('corn.tif', 2);
            else
                try
                    im = imread(imagefile);
                catch ME
                    % If problem reading image, display error message
                    uialert(app.UIFigure, ME.message, 'Image Error');
                    return;
                end            
            end 
            
            % Create histograms based on number of color channels
            switch size(im,3)
                case 1
                    % Display the grayscale image
                    imagesc(app.ImageAxes,im);
                    
                    % Plot all histograms with the same data for grayscale
                    histr = histogram(app.RedAxes, im, 'FaceColor',[1 0 0],'EdgeColor', 'none');
                    histg = histogram(app.GreenAxes, im, 'FaceColor',[0 1 0],'EdgeColor', 'none');
                    histb = histogram(app.BlueAxes, im, 'FaceColor',[0 0 1],'EdgeColor', 'none');
                    
                case 3
                    % Display the truecolor image
                    imagesc(app.ImageAxes,im);
                    
                    % Plot the histograms
                    histr = histogram(app.RedAxes, im(:,:,1), 'FaceColor', [1 0 0], 'EdgeColor', 'none');
                    histg = histogram(app.GreenAxes, im(:,:,2), 'FaceColor', [0 1 0], 'EdgeColor', 'none');
                    histb = histogram(app.BlueAxes, im(:,:,3), 'FaceColor', [0 0 1], 'EdgeColor', 'none');
                    
                otherwise
                    % Error when image is not grayscale or truecolor
                    uialert(app.UIFigure, 'Image must be grayscale or truecolor.', 'Image Error');
                    return;
            end
                % Get largest bin count
                maxr = max(histr.BinCounts);
                maxg = max(histg.BinCounts);
                maxb = max(histb.BinCounts);
                maxcount = max([maxr maxg maxb]);
                
                % Set y axes limits based on largest bin count
                app.RedAxes.YLim = [0 maxcount];
                app.RedAxes.YTick = round([0 maxcount/2 maxcount], 2, 'significant');
                app.GreenAxes.YLim = [0 maxcount];
                app.GreenAxes.YTick = round([0 maxcount/2 maxcount], 2, 'significant');
                app.BlueAxes.YLim = [0 maxcount];
                app.BlueAxes.YTick = round([0 maxcount/2 maxcount], 2, 'significant');
         
        end
    end
    

    % Callbacks that handle component events
    methods (Access = private)

        % Code that executes after component creation
        function startupFcn(app, varargin)
            % Configure image axes
            app.ImageAxes.Visible = 'off';
            app.ImageAxes.Colormap = gray(256);
            axis(app.ImageAxes, 'image');
            
            
        end

        % Callback function
        function DropDownValueChanged(app, event)
            
            % Update the image and histograms
            updateimage(app, app.DropDown.Value);
        end

        % Callback function
        function LoadButtonPushed(app, event)
               
            % Display uigetfile dialog
            filterspec = {'*.jpg;*.tif;*.png;*.gif','All Image Files'};
            [f, p] = uigetfile(filterspec);
            
            % Make sure user didn't cancel uigetfile dialog
            if (ischar(p))
               fname = [p f];
               updateimage(app, fname);
            end
        end

        % Button pushed function: OpenButton
        function OpenButtonPushed(app, event)
            [filename,filepath] = uigetfile({'*,*';'*.jpg';'*.png';'*.bmp'}, 'Select File to Open');
            fullname = [filepath, filename];
            ImageFile = imread(fullname);
            axes(handles.axes1)
            imagesc(ImageFile);
            set(handles.axes1,'visible','off') %hide the current axes
            set(get(handles.axes1,'children'),'visible','off') %hide the current axes contents
            axis off;
          
        end
    end

    % Component initialization
    methods (Access = private)

        % Create UIFigure and components
        function createComponents(app)

            % Create UIFigure and hide until all components are created
            app.UIFigure = uifigure('Visible', 'off');
            app.UIFigure.AutoResizeChildren = 'off';
            app.UIFigure.Position = [100 100 1262 767];
            app.UIFigure.Name = 'Image Histograms';
            app.UIFigure.Resize = 'off';

            % Create ImageAxes_2
            app.ImageAxes_2 = uiaxes(app.UIFigure);
            app.ImageAxes_2.XTick = [];
            app.ImageAxes_2.XTickLabel = {'[ ]'};
            app.ImageAxes_2.YTick = [];
            app.ImageAxes_2.Position = [765 386 429 305];

            % Create BrainViewButton
            app.BrainViewButton = uibutton(app.UIFigure, 'push');
            app.BrainViewButton.Position = [774 707 100 22];
            app.BrainViewButton.Text = {'Brain View'; ''};

            % Create BloodViewButton
            app.BloodViewButton = uibutton(app.UIFigure, 'push');
            app.BloodViewButton.Position = [890 707 100 22];
            app.BloodViewButton.Text = 'Blood View';

            % Create VentriclesViewButton
            app.VentriclesViewButton = uibutton(app.UIFigure, 'push');
            app.VentriclesViewButton.Position = [1006 707 100 22];
            app.VentriclesViewButton.Text = 'Ventricles View';

            % Create TissueViewButton
            app.TissueViewButton = uibutton(app.UIFigure, 'push');
            app.TissueViewButton.Position = [1112 707 100 22];
            app.TissueViewButton.Text = 'Tissue View';

            % Create InfoPanel
            app.InfoPanel = uipanel(app.UIFigure);
            app.InfoPanel.AutoResizeChildren = 'off';
            app.InfoPanel.Title = 'Info';
            app.InfoPanel.Position = [16 707 219 59];

            % Create PatientNameLabel_2
            app.PatientNameLabel_2 = uilabel(app.InfoPanel);
            app.PatientNameLabel_2.HorizontalAlignment = 'right';
            app.PatientNameLabel_2.FontWeight = 'bold';
            app.PatientNameLabel_2.Position = [15 8 82 22];
            app.PatientNameLabel_2.Text = 'Patient Name';

            % Create PatientNameEditField
            app.PatientNameEditField = uieditfield(app.InfoPanel, 'text');
            app.PatientNameEditField.Position = [111 8 100 22];

            % Create OptionPanel
            app.OptionPanel = uipanel(app.UIFigure);
            app.OptionPanel.AutoResizeChildren = 'off';
            app.OptionPanel.Title = 'Option Panel';
            app.OptionPanel.FontWeight = 'bold';
            app.OptionPanel.Position = [13 601 260 98];

            % Create OpenButton
            app.OpenButton = uibutton(app.OptionPanel, 'push');
            app.OpenButton.ButtonPushedFcn = createCallbackFcn(app, @OpenButtonPushed, true);
            app.OpenButton.Position = [6 48 100 22];
            app.OpenButton.Text = 'Open';

            % Create FlipButton
            app.FlipButton = uibutton(app.OptionPanel, 'push');
            app.FlipButton.Position = [119 48 100 22];
            app.FlipButton.Text = 'Flip';

            % Create RunButton
            app.RunButton = uibutton(app.OptionPanel, 'push');
            app.RunButton.Position = [80 7 100 22];
            app.RunButton.Text = 'Run';

            % Create EditingPanel
            app.EditingPanel = uipanel(app.UIFigure);
            app.EditingPanel.AutoResizeChildren = 'off';
            app.EditingPanel.Title = 'Editing Panel';
            app.EditingPanel.FontWeight = 'bold';
            app.EditingPanel.Position = [13 289 260 304];

            % Create CorrectionButton
            app.CorrectionButton = uibutton(app.EditingPanel, 'push');
            app.CorrectionButton.Position = [80 250 100 22];
            app.CorrectionButton.Text = 'Correction';

            % Create CleaningToolForBloodButton
            app.CleaningToolForBloodButton = uibutton(app.EditingPanel, 'push');
            app.CleaningToolForBloodButton.Position = [58 217 144 22];
            app.CleaningToolForBloodButton.Text = 'Cleaning Tool For Blood';

            % Create CleaningToolforVentriclesButton
            app.CleaningToolforVentriclesButton = uibutton(app.EditingPanel, 'push');
            app.CleaningToolforVentriclesButton.Position = [49.5 182 161 22];
            app.CleaningToolforVentriclesButton.Text = 'Cleaning Tool for Ventricles';

            % Create CleaningToolforCalcificationButton
            app.CleaningToolforCalcificationButton = uibutton(app.EditingPanel, 'push');
            app.CleaningToolforCalcificationButton.Position = [43 151 174 22];
            app.CleaningToolforCalcificationButton.Text = 'Cleaning Tool for Calcification';

            % Create MorphologicalOperationsButton
            app.MorphologicalOperationsButton = uibutton(app.EditingPanel, 'push');
            app.MorphologicalOperationsButton.Position = [54 117 152 22];
            app.MorphologicalOperationsButton.Text = 'Morphological Operations';

            % Create UndoButton
            app.UndoButton = uibutton(app.EditingPanel, 'push');
            app.UndoButton.Position = [80 83 100 22];
            app.UndoButton.Text = 'Undo';

            % Create BloodToolButton
            app.BloodToolButton = uibutton(app.EditingPanel, 'push');
            app.BloodToolButton.Position = [80 49 100 22];
            app.BloodToolButton.Text = 'Blood Tool';

            % Create DeleteButton
            app.DeleteButton = uibutton(app.EditingPanel, 'push');
            app.DeleteButton.Position = [80 16 100 22];
            app.DeleteButton.Text = 'Delete';

            % Create AnalyzePanel
            app.AnalyzePanel = uipanel(app.UIFigure);
            app.AnalyzePanel.AutoResizeChildren = 'off';
            app.AnalyzePanel.Title = 'Analyze Panel';
            app.AnalyzePanel.FontWeight = 'bold';
            app.AnalyzePanel.Position = [13 103 260 178];

            % Create CreateBoundaryButton
            app.CreateBoundaryButton = uibutton(app.AnalyzePanel, 'push');
            app.CreateBoundaryButton.Position = [71 133 106 22];
            app.CreateBoundaryButton.Text = 'Create Boundary';

            % Create SAHButton
            app.SAHButton = uibutton(app.AnalyzePanel, 'push');
            app.SAHButton.Position = [71 103 100 22];
            app.SAHButton.Text = 'SAH';

            % Create ICHButton
            app.ICHButton = uibutton(app.AnalyzePanel, 'push');
            app.ICHButton.Position = [71 72 100 22];
            app.ICHButton.Text = 'ICH';

            % Create SDHButton
            app.SDHButton = uibutton(app.AnalyzePanel, 'push');
            app.SDHButton.Position = [71 41 100 22];
            app.SDHButton.Text = 'SDH';

            % Create IVHButton
            app.IVHButton = uibutton(app.AnalyzePanel, 'push');
            app.IVHButton.Position = [71 12 100 22];
            app.IVHButton.Text = 'IVH';

            % Create DataPanel
            app.DataPanel = uipanel(app.UIFigure);
            app.DataPanel.AutoResizeChildren = 'off';
            app.DataPanel.Title = 'Data Panel';
            app.DataPanel.FontWeight = 'bold';
            app.DataPanel.Position = [14 31 260 65];

            % Create AddExplanationButton
            app.AddExplanationButton = uibutton(app.DataPanel, 'push');
            app.AddExplanationButton.FontSize = 10;
            app.AddExplanationButton.Position = [67 21 100 22];
            app.AddExplanationButton.Text = 'Add Explanation';

            % Create ExportDataButton
            app.ExportDataButton = uibutton(app.DataPanel, 'push');
            app.ExportDataButton.FontSize = 10;
            app.ExportDataButton.Position = [67 0 100 22];
            app.ExportDataButton.Text = 'Export Data';

            % Create OpenResultsButton
            app.OpenResultsButton = uibutton(app.UIFigure, 'push');
            app.OpenResultsButton.FontSize = 10;
            app.OpenResultsButton.Position = [79 1 100 22];
            app.OpenResultsButton.Text = 'Open Results';

            % Create StartBrainSliceButton
            app.StartBrainSliceButton = uibutton(app.UIFigure, 'push');
            app.StartBrainSliceButton.Position = [431 338 100 22];
            app.StartBrainSliceButton.Text = 'StartBrainSlice';

            % Create EditField
            app.EditField = uieditfield(app.UIFigure, 'text');
            app.EditField.Position = [547 338 100 22];

            % Create FullBrainSliceButton
            app.FullBrainSliceButton = uibutton(app.UIFigure, 'push');
            app.FullBrainSliceButton.Position = [831 338 100 22];
            app.FullBrainSliceButton.Text = 'FullBrainSlice';

            % Create EditField_2
            app.EditField_2 = uieditfield(app.UIFigure, 'text');
            app.EditField_2.Position = [952 338 100 22];

            % Create ComputationPanel
            app.ComputationPanel = uipanel(app.UIFigure);
            app.ComputationPanel.AutoResizeChildren = 'off';
            app.ComputationPanel.Title = 'Computation Panel';
            app.ComputationPanel.FontWeight = 'bold';
            app.ComputationPanel.Position = [303 69 909 221];

            % Create AllSlicesPanel
            app.AllSlicesPanel = uipanel(app.ComputationPanel);
            app.AllSlicesPanel.AutoResizeChildren = 'off';
            app.AllSlicesPanel.Title = 'All Slices';
            app.AllSlicesPanel.Position = [51 26 421 155];

            % Create BrainVolumeEditFieldLabel
            app.BrainVolumeEditFieldLabel = uilabel(app.AllSlicesPanel);
            app.BrainVolumeEditFieldLabel.HorizontalAlignment = 'right';
            app.BrainVolumeEditFieldLabel.FontSize = 10;
            app.BrainVolumeEditFieldLabel.Position = [21 101 65 22];
            app.BrainVolumeEditFieldLabel.Text = 'Brain Volume';

            % Create BrainVolumeEditField
            app.BrainVolumeEditField = uieditfield(app.AllSlicesPanel, 'text');
            app.BrainVolumeEditField.FontSize = 10;
            app.BrainVolumeEditField.Position = [101 101 100 22];

            % Create BloodVolumeEditFieldLabel
            app.BloodVolumeEditFieldLabel = uilabel(app.AllSlicesPanel);
            app.BloodVolumeEditFieldLabel.HorizontalAlignment = 'right';
            app.BloodVolumeEditFieldLabel.FontSize = 10;
            app.BloodVolumeEditFieldLabel.Position = [19 73 67 22];
            app.BloodVolumeEditFieldLabel.Text = 'Blood Volume';

            % Create BloodVolumeEditField
            app.BloodVolumeEditField = uieditfield(app.AllSlicesPanel, 'text');
            app.BloodVolumeEditField.FontSize = 10;
            app.BloodVolumeEditField.Position = [101 73 100 22];

            % Create VentriclesVolumeEditFieldLabel
            app.VentriclesVolumeEditFieldLabel = uilabel(app.AllSlicesPanel);
            app.VentriclesVolumeEditFieldLabel.HorizontalAlignment = 'right';
            app.VentriclesVolumeEditFieldLabel.FontSize = 10;
            app.VentriclesVolumeEditFieldLabel.Position = [15 41 85 22];
            app.VentriclesVolumeEditFieldLabel.Text = 'Ventricles Volume';

            % Create VentriclesVolumeEditField
            app.VentriclesVolumeEditField = uieditfield(app.AllSlicesPanel, 'text');
            app.VentriclesVolumeEditField.FontSize = 10;
            app.VentriclesVolumeEditField.Position = [108 41 100 22];

            % Create TissueVolumeEditFieldLabel
            app.TissueVolumeEditFieldLabel = uilabel(app.AllSlicesPanel);
            app.TissueVolumeEditFieldLabel.HorizontalAlignment = 'right';
            app.TissueVolumeEditFieldLabel.FontSize = 10;
            app.TissueVolumeEditFieldLabel.Position = [22 8 71 22];
            app.TissueVolumeEditFieldLabel.Text = 'Tissue Volume';

            % Create TissueVolumeEditField
            app.TissueVolumeEditField = uieditfield(app.AllSlicesPanel, 'text');
            app.TissueVolumeEditField.FontSize = 10;
            app.TissueVolumeEditField.Position = [101 8 100 22];

            % Create BloodStatsPanel
            app.BloodStatsPanel = uipanel(app.AllSlicesPanel);
            app.BloodStatsPanel.AutoResizeChildren = 'off';
            app.BloodStatsPanel.Title = 'Blood Stats';
            app.BloodStatsPanel.Position = [216 -12 190 154];

            % Create SAHEditFieldLabel
            app.SAHEditFieldLabel = uilabel(app.BloodStatsPanel);
            app.SAHEditFieldLabel.HorizontalAlignment = 'right';
            app.SAHEditFieldLabel.FontSize = 10;
            app.SAHEditFieldLabel.Position = [11 106 26 22];
            app.SAHEditFieldLabel.Text = 'SAH';

            % Create SAHEditField
            app.SAHEditField = uieditfield(app.BloodStatsPanel, 'text');
            app.SAHEditField.FontSize = 10;
            app.SAHEditField.Position = [52 106 100 22];

            % Create ICHEditFieldLabel
            app.ICHEditFieldLabel = uilabel(app.BloodStatsPanel);
            app.ICHEditFieldLabel.HorizontalAlignment = 'right';
            app.ICHEditFieldLabel.FontSize = 10;
            app.ICHEditFieldLabel.Position = [12 78 25 22];
            app.ICHEditFieldLabel.Text = 'ICH';

            % Create ICHEditField
            app.ICHEditField = uieditfield(app.BloodStatsPanel, 'text');
            app.ICHEditField.FontSize = 10;
            app.ICHEditField.Position = [52 78 100 22];

            % Create SDHEditFieldLabel
            app.SDHEditFieldLabel = uilabel(app.BloodStatsPanel);
            app.SDHEditFieldLabel.HorizontalAlignment = 'right';
            app.SDHEditFieldLabel.FontSize = 10;
            app.SDHEditFieldLabel.Position = [10 53 27 22];
            app.SDHEditFieldLabel.Text = 'SDH';

            % Create SDHEditField
            app.SDHEditField = uieditfield(app.BloodStatsPanel, 'text');
            app.SDHEditField.FontSize = 10;
            app.SDHEditField.Position = [52 53 100 22];

            % Create IVHEditFieldLabel
            app.IVHEditFieldLabel = uilabel(app.BloodStatsPanel);
            app.IVHEditFieldLabel.HorizontalAlignment = 'right';
            app.IVHEditFieldLabel.FontSize = 10;
            app.IVHEditFieldLabel.Position = [12 20 25 22];
            app.IVHEditFieldLabel.Text = 'IVH';

            % Create IVHEditField
            app.IVHEditField = uieditfield(app.BloodStatsPanel, 'text');
            app.IVHEditField.FontSize = 10;
            app.IVHEditField.Position = [52 20 100 22];

            % Create CurrentSlicePanel
            app.CurrentSlicePanel = uipanel(app.ComputationPanel);
            app.CurrentSlicePanel.AutoResizeChildren = 'off';
            app.CurrentSlicePanel.Title = 'Current Slice';
            app.CurrentSlicePanel.Position = [500 4 391 193];

            % Create BloodStatsPanel_2
            app.BloodStatsPanel_2 = uipanel(app.CurrentSlicePanel);
            app.BloodStatsPanel_2.AutoResizeChildren = 'off';
            app.BloodStatsPanel_2.Title = 'Blood Stats';
            app.BloodStatsPanel_2.Position = [47 22 202 138];

            % Create SAHEditField_2Label
            app.SAHEditField_2Label = uilabel(app.BloodStatsPanel_2);
            app.SAHEditField_2Label.HorizontalAlignment = 'right';
            app.SAHEditField_2Label.FontSize = 10;
            app.SAHEditField_2Label.Position = [39 88 26 22];
            app.SAHEditField_2Label.Text = 'SAH';

            % Create SAHEditField_2
            app.SAHEditField_2 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.SAHEditField_2.FontSize = 10;
            app.SAHEditField_2.Position = [80 88 100 22];

            % Create ICHEditField_2Label
            app.ICHEditField_2Label = uilabel(app.BloodStatsPanel_2);
            app.ICHEditField_2Label.HorizontalAlignment = 'right';
            app.ICHEditField_2Label.FontSize = 10;
            app.ICHEditField_2Label.Position = [40 62 25 22];
            app.ICHEditField_2Label.Text = 'ICH';

            % Create ICHEditField_2
            app.ICHEditField_2 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.ICHEditField_2.FontSize = 10;
            app.ICHEditField_2.Position = [80 62 100 22];

            % Create SDHEditField_2Label
            app.SDHEditField_2Label = uilabel(app.BloodStatsPanel_2);
            app.SDHEditField_2Label.HorizontalAlignment = 'right';
            app.SDHEditField_2Label.FontSize = 10;
            app.SDHEditField_2Label.Position = [38 34 27 22];
            app.SDHEditField_2Label.Text = 'SDH';

            % Create SDHEditField_2
            app.SDHEditField_2 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.SDHEditField_2.FontSize = 10;
            app.SDHEditField_2.Position = [80 34 100 22];

            % Create IVHLabel
            app.IVHLabel = uilabel(app.BloodStatsPanel_2);
            app.IVHLabel.HorizontalAlignment = 'right';
            app.IVHLabel.FontSize = 10;
            app.IVHLabel.Position = [40 9 25 22];
            app.IVHLabel.Text = 'IVH';

            % Create IVHEditField_2
            app.IVHEditField_2 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.IVHEditField_2.FontSize = 10;
            app.IVHEditField_2.Position = [80 9 100 22];

            % Create EditField_9
            app.EditField_9 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.EditField_9.Position = [1 37 40 16];

            % Create EditField_10
            app.EditField_10 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.EditField_10.Position = [1 12 40 16];

            % Create EditField_11
            app.EditField_11 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.EditField_11.Position = [1 89 40 16];

            % Create EditField_12
            app.EditField_12 = uieditfield(app.BloodStatsPanel_2, 'text');
            app.EditField_12.Position = [1 65 40 16];

            % Create CreateBoundaryStatsPanel
            app.CreateBoundaryStatsPanel = uipanel(app.CurrentSlicePanel);
            app.CreateBoundaryStatsPanel.AutoResizeChildren = 'off';
            app.CreateBoundaryStatsPanel.Title = 'Create Boundary Stats';
            app.CreateBoundaryStatsPanel.Position = [248 25 121 133];

            % Create EditField_3
            app.EditField_3 = uieditfield(app.CreateBoundaryStatsPanel, 'text');
            app.EditField_3.Position = [21 88 59 17];

            % Create EditField_4
            app.EditField_4 = uieditfield(app.CreateBoundaryStatsPanel, 'text');
            app.EditField_4.Position = [21 65 59 18];

            % Create EditField_5
            app.EditField_5 = uieditfield(app.CreateBoundaryStatsPanel, 'text');
            app.EditField_5.Position = [21 41 59 20];

            % Create EditField_6
            app.EditField_6 = uieditfield(app.CreateBoundaryStatsPanel, 'text');
            app.EditField_6.Position = [21 17 59 20];

            % Create BrainDemoLabel
            app.BrainDemoLabel = uilabel(app.UIFigure);
            app.BrainDemoLabel.FontSize = 14;
            app.BrainDemoLabel.FontWeight = 'bold';
            app.BrainDemoLabel.Position = [554 746 84 22];
            app.BrainDemoLabel.Text = 'Brain Demo';

            % Create ImageAxes_3
            app.ImageAxes_3 = uiaxes(app.UIFigure);
            app.ImageAxes_3.XTick = [];
            app.ImageAxes_3.XTickLabel = {'[ ]'};
            app.ImageAxes_3.YTick = [];
            app.ImageAxes_3.Position = [303 386 429 305];

            % Show the figure after all components are created
            app.UIFigure.Visible = 'on';
        end
    end

    % App creation and deletion
    methods (Access = public)

        % Construct app
        function app = Patient(varargin)

            % Create UIFigure and components
            createComponents(app)

            % Register the app with App Designer
            registerApp(app, app.UIFigure)

            % Execute the startup function
            runStartupFcn(app, @(app)startupFcn(app, varargin{:}))

            if nargout == 0
                clear app
            end
        end

        % Code that executes before app deletion
        function delete(app)

            % Delete UIFigure when app is deleted
            delete(app.UIFigure)
        end
    end
    end

Hi Debasish,

Please find my code above. Your suggestions would be very much appreciated. Thank you.

Answer 1

[Floris]

So based on the code you shared it seems like you have made multiple copies of ImageAxes:

• ImageAxes
• ImageAxes_2
• ImageAxes_3

And in your public properties, just ImageAxes_2 and ImageAxes_3 are initialized. So somehow your original ImageAxes initialization was deleted. So now when your startup function is called it cannot find the ImageAxes property. I believe this happens when you rename a component in the App Designer multiple times, or create it multiple times.

So just add ImageAxes to your properties and you should be good to go!

The code:

classdef Patient < matlab.apps.AppBase
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure                        matlab.ui.Figure
        ImageAxes                     matlab.ui.control.UIAxes % Renamed this to ImageAxes
        % all the other properties ...
    end
    
    % All the other functions and properties here ...
end

Answer 2

[Warid Islam]

I changed the code and that specific problem seems to be not there any more. However, I am getting a new error.

% Create histograms based on number of color channels
            switch size(im,3)
                case 1
                    % Display the grayscale image
                    imagesc(app.ImageAxes2,im);
                    
                    % Plot all histograms with the same data for grayscale
                    histr = histogram(app.RedAxes, im, 'FaceColor',[1 0 0],'EdgeColor', 'none');
                    histg = histogram(app.GreenAxes, im, 'FaceColor',[0 1 0],'EdgeColor', 'none');
                    histb = histogram(app.BlueAxes, im, 'FaceColor',[0 0 1],'EdgeColor', 'none');
                    
                case 3
                    % Display the truecolor image
                    imagesc(app.ImageAxes3,im);
                    
                    % Plot the histograms
                    histr = histogram(app.RedAxes, im(:,:,1), 'FaceColor', [1 0 0], 'EdgeColor', 'none');
                    histg = histogram(app.GreenAxes, im(:,:,2), 'FaceColor', [0 1 0], 'EdgeColor', 'none');
                    histb = histogram(app.BlueAxes, im(:,:,3), 'FaceColor', [0 0 1], 'EdgeColor', 'none');
                    
                otherwise
                    % Error when image is not grayscale or truecolor
                    uialert(app.UIFigure, 'Image must be grayscale or truecolor.', 'Image Error');
                    return;
            end
                % Get largest bin count
                maxr = max(histr.BinCounts);
                maxg = max(histg.BinCounts);
                maxb = max(histb.BinCounts);
                maxcount = max([maxr maxg maxb]);
                
                % Set y axes limits based on largest bin count
                app.RedAxes.YLim = [0 maxcount];
                app.RedAxes.YTick = round([0 maxcount/2 maxcount], 2, 'significant');
                app.GreenAxes.YLim = [0 maxcount];
                app.GreenAxes.YTick = round([0 maxcount/2 maxcount], 2, 'significant');
                app.BlueAxes.YLim = [0 maxcount];
                app.BlueAxes.YTick = round([0 maxcount/2 maxcount], 2, 'significant');
         
        end
    end
    

it says ILLEGAL USE OF RESERVED KEYWORD "SWITCH'.

Thank you.

[Rik]

This is not an answer. In future, please also post a link to your question if you choose to re-post something, and also include a link in your new question to the original for context.

And if you have much code (more than about 20 lines), please put it in an attachment to improve the readability of the thread.