listbox rendering problem 2014b

Can anyone see whats wrong here, Im using a popup menu to select which file types to list in a list box

Warning: Single-selection 'listbox' control requires that 'Value' be an integer within String range
Control will not be rendered until all of its parameter values are valid

It works fine when I select

*.* as the filter, which is my case 1 below

On the popupmenu callback, I use

%Get user selected file type

popup_sel_index = get(handles.popupmenu1, 'Value');
switch popup_sel_index
    case 1
       filenameFilter = '*.*';
       ImageFiles     = dir(fullfile(folder,filenameFilter));
    case 2
        filenameFilter = '*.tif*';
        ImageFiles     = dir(fullfile(folder,filenameFilter)) ;
        set(handles.pbDraw,'Enable','on');
    case 3
       filenameFilter = '*.jpg*';
       ImageFiles     = dir(fullfile(folder,filenameFilter)); 
       set(handles.pbDraw,'Enable','on');
    case 4
        filenameFilter = '*.idat*';
        ImageFiles     = dir(fullfile(folder,filenameFilter)); 
        set(handles.pbDraw,'Enable','off');
    case 5
        filenameFilter = '*.gtc';
        ImageFiles     = dir(fullfile(folder,filenameFilter)); 
        set(handles.pbDraw,'Enable','off');

    case 6
        filenameFilter = '*.log*';
        ImageFiles     = dir(fullfile(folder,filenameFilter)); 
        set(handles.pbDraw,'Enable','off');    
    case 7
        filenameFilter = '*.xls*';
        ImageFiles     = dir(fullfile(folder,filenameFilter)); 
        set(handles.pbDraw,'Enable','off');         
        set(handles.editPrefix,'String','C01-');
    case 8
        filenameFilter = '*red.tif*';
       ImageFiles     = dir(fullfile(folder,filenameFilter)); 
       set(handles.pbDraw,'Enable','on'); 
    case 9
        filenameFilter = '*grn.tif*';
       ImageFiles     = dir(fullfile(folder,filenameFilter)); 
       set(handles.pbDraw,'Enable','on');     
end
guidata(hObject,handles);
drawnow;

    %populate listbox with files
    ListOfImageNames = {};

    for Index = 1:length(ImageFiles)
        baseFileName = ImageFiles(Index).name;
        [folder1, name, extension] = fileparts(baseFileName);
            extension = upper(extension);
        ListOfImageNames = [ListOfImageNames baseFileName];
    end
    ListOfImageNames
     set(handles.listbox1, 'string', ListOfImageNames);
     drawnow;
     %count files in listbox
      str = get( handles.listbox1, 'String' );    % Get number of
      lc = numel( str );
      %disp('gtc selected true');

Answer 1

[Titus Edelhofer]

Hi,

I guess the following happened: your listbox1 contains e.g. 20 file names. You select no 15. Now using your popup menu you select another type and your listbox1 contains "only" 10 file names. But you did not change the selected no 15. Therefore: your value is outside the range 1-10.

To make the long story short: it's best practice, that when you change the 'string' property of a listbox, reset the value to the first entry, i.e.

set(handles.listbox1, 'string', ListOfImageNames, 'value', 1);

Titus