OSError: [Errno 2]

[Floreg2000]

After I run:

python raspi_alarm_clock.py

I get this:

Traceback (most recent call last):
File "raspi_alarm_clock.py", line 128, in
main()
File "raspi_alarm_clock.py", line 93, in main
call(["mpc", "volume", str(current_volume)])
File "/usr/lib/python2.7/subprocess.py", line 522, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib/python2.7/subprocess.py", line 710, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory

Can you please help me solving this problem? I know it has been 2 years you made this project but can you look into it?