intermittant imwrite permissions error

I have a script that saves a cropped version of a tif stack but intermitantly throws an error that it is unable to open the file for writing (and I may not have write permissions) in the middle of the 300 frame video (but on a different frame each time when I tried running this segment of the code 10 times.

 for i = 1:bf_N_frames
                imwrite(bf_vid_rot_crop{ivid}(:,:,i),[tfm_init_user_bf_pathnamestack{ivid},tfm_init_user_bf_filenamestack{ivid},'_cropped',tfm_init_user_bf_vidext{ivid}],'writemode','append');
 end
 

Thanks!

Answer 1

[Jan]

Maybe your disk is full or a callback of a GUI or timer changed the current directory. Let Matlab help you to identify the problem:

FileName = [tfm_init_user_bf_pathnamestack{ivid}, ...
            tfm_init_user_bf_filenamestack{ivid}, ...
            '_cropped', tfm_init_user_bf_vidext{ivid}];
for i = 1:bf_N_frames
    try
        imwrite(bf_vid_rot_crop{ivid}(:,:,i), FileName, 'writemode', 'append');
    catch ME
        fprintf(2, 'File:    %s\n', FileName);
        fprintf(2, 'CD:      %s\n', cd);
        fprintf(2, 'Problem: %s\n', ME.message);
        % Perhaps check if this is a timing problem:
        pause(0.2);
        try
            imwrite(bf_vid_rot_crop{ivid}(:,:,i), FileName, 'writemode', 'append');
            fprintf(2, 'Retry worked...\n')
        catch ME2
            error('Failed: %s', ME2.message);
        end
    end
end

What do you get as message?

By the way, 'tfm_init_user_bf_pathnamestack' is a complicated name for a variable.