psychopy.org | Reference | Downloads | Github

'Hello World!' won't work/can't find file name error

macOS 10.13.1
PsychoPy v1.90.1
Standard Standalone

I am trying to use the builder for the ‘Hello World!’ example but cannot get it to work. I have a folder on my desktop ‘PsychoPy_Experiments’ which I am saving things to and previously I had the error message about not being able to find file name of directory.

Before I downloaded the standalone version I did the manual installation - I’m not sure whether this is a problem? When I downloaded PsychoPy it appeared as a remote disk no my MacBook and I copied it to Applications.

Any help will be much appreciated :slight_smile:

error message:

Running: /Users/zoeanastasiou/Desktop/PsychoPy_Experiments/trial1.py

Traceback (most recent call last):
File “/Users/zoeanastasiou/Desktop/PsychoPy_Experiments/trial1.py”, line 14, in
from psychopy import locale_setup, sound, gui, visual, core, data, event, logging, clock
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/sound/init.py”, line 79, in
from . import backend_sounddevice as backend
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/sound/backend_sounddevice.py”, line 20, in
import soundfile as sf
File “soundfile/init.pyc”, line 1, in
File “soundfile/soundfile.pyc”, line 270, in
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/cffi/api.py”, line 141, in dlopen
lib, function_cache = _make_ffi_library(self, name, flags)
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/cffi/api.py”, line 802, in _make_ffi_library
backendlib = _load_backend_lib(backend, libname, flags)
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/cffi/api.py”, line 797, in _load_backend_lib
raise OSError(msg)
OSError: cannot load library ‘/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib’: dlopen(/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib, 2): no suitable image found. Did find:
/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib: stat() failed with errno=20. Additionally, ctypes.util.find_library() did not manage to locate a library called ‘/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib’
e

Running: /Users/zoeanastasiou/Desktop/PsychoPy_Experiments/trial1.py

Traceback (most recent call last):
File “/Users/zoeanastasiou/Desktop/PsychoPy_Experiments/trial1.py”, line 14, in
from psychopy import locale_setup, sound, gui, visual, core, data, event, logging, clock
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/sound/init.py”, line 79, in
from . import backend_sounddevice as backend
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/sound/backend_sounddevice.py”, line 20, in
import soundfile as sf
File “soundfile/init.pyc”, line 1, in
File “soundfile/soundfile.pyc”, line 270, in
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/cffi/api.py”, line 141, in dlopen
lib, function_cache = _make_ffi_library(self, name, flags)
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/cffi/api.py”, line 802, in _make_ffi_library
backendlib = _load_backend_lib(backend, libname, flags)
File “/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/cffi/api.py”, line 797, in _load_backend_lib
raise OSError(msg)
OSError: cannot load library ‘/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib’: dlopen(/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib, 2): no suitable image found. Did find:
/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib: stat() failed with errno=20. Additionally, ctypes.util.find_library() did not manage to locate a library called ‘/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/site-packages.zip/soundfile/_soundfile_data/libsndfile.dylib’

I found this suggestion from another user and it seemed to work:

go to preferences for psychopy, and under the General tab find “audio library”. there should be 3 items there: [u’sounddevice’, u’pyo’, u’pygame’, ]. delete “u’sounddevice’ " so that only " u’pyo’, u’pygame’,” are in the brackets. Apply these changes and stroop as well as other tests should work!