Problem when compiling the program

[Aska123]

Respected Sir,
When I run following command
datasets_feature(datasets, train_lists, test_lists, feature, c);
I got error:
Error using imread (line 349)
File "sun2.jpg" does not exist.

Error in imgread (line 12)
I = imread(img);

Error in build_dictionary>(parfor body)
(line 49)
img = imgread(filelist{perm(i)},
p);

Error in build_dictionary (line 47)
parfor i=1:num_images

Error in datasets_feature (line 31)
c.feature_config.(feature).dictionary
= build_dictionary(train_lists{i},
feature, c);

how to remeove this error.
Thanks