error with caffe root

When i try to run digits, this message appears. I have spent the past 5 hours researching and trying to fix it. What should i do?

“/home/mikulis/digits/caffe” from CAFFE_ROOT does not point to a valid installation of Caffe.
Use the envvar CAFFE_ROOT to indicate a valid installation.
Traceback (most recent call last):
File “/usr/lib/python2.7/”, line 174, in _run_module_as_main
main”, fname, loader, pkg_name)
File “/usr/lib/python2.7/”, line 72, in _run_code
exec code in run_globals
File “/home/mikulis/digits/digits/”, line 70, in
File “/home/mikulis/digits/digits/”, line 53, in main
import digits.config
File “digits/config/”, line 7, in
from . import ( # noqa
File “digits/config/”, line 228, in
executable, version, flavor = load_from_envvar(‘CAFFE_ROOT’)
File “digits/config/”, line 33, in load_from_envvar
% executable_dir)
ValueError: Caffe executable not found at “/home/mikulis/digits/caffe/build/tools”