image processing write permission

when i use imwrite command this appear to me "Unable to open file for writing. You may not have write permission"

., please i need help to solve this

Answer 1

[Jan]

If you specify a folder, in which you do not have write permissions, you cannot create a file there. If you omit a folder in the file name, the current folder is used.

folder = tempdir;
img    = rnd(100, 100, 3);
imwrite(img, fullfile(folder, 'YourFile.png'));

Does this fail also?