I get this error when the filename is the old filename is the same as the new filename:
movefile('A.mat','A.mat')
Error using movefile
Cannot copy or move a file or directory onto
itself.
If you don't want to rename all of the files, i.e. the ones that already have the new name are all set, then just skip that iteration
for ix = 1:sn
newname=sprintf('0%d.jpg',ix);
if ~isequal(strx{1,ix},newname) % if the names are different
movefile(strx{1,ix},newname);
end
end
