MATLAB: For loop doesnt terminate-kindly help

for loop termination

Hi, I have written a code to apply a random crop for a set of three images stored in a folder '1' at D: drive and store it in a separate folder named 'chrom-randcrop1' in the same drive. The code is as follows:
myFolder = 'D:\1';
% Check to make sure that folder actually exists. Warn user if it doesn't.
if ~isdir(myFolder)
errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
uiwait(warndlg(errorMessage));
return;
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.bmp');
theFiles = dir(filePattern);
mkdir('D:\chrom-randcrop1')
% image processing-random cropping of a 100*100 image from the input image
for k = 1 : length(theFiles)
baseFileName = theFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
imageArray = imread(fullFileName);
imageArray5=random_square_grab(imageArray,100);
baseOutputFileName = sprintf('randcrop100_1(%d).bmp', k);
outputFolder = 'D:\chrom-randcrop1';
fullOutputFileName = fullfile(outputFolder, baseOutputFileName);
imwrite(imageArray5, fullOutputFileName)
end
dir D:\chrom-randcrop1
The issue is the loop doesn't terminate. The folder is created but then the loop remains busy. Kindly help me with the corrections in this code. Thanks.

Best Answer

Add this before the for loop
whos theFiles  % No semicolon!

numFiles = length(theFiles)  % No semicolon!
if numFiles == 0 || isempty(theFiles)
    warningMessage = 'No files found';
    uiwait(warndlg(warningMessage));
    return;
end
for k = 1 : numFiles
What do you see in the command window, and does the warning pop up a message box?
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