# Preferences menu issue (2020v.2.10, Windows10)

**URL:** <https://discourse.psychopy.org/t/preferences-menu-issue-2020v-2-10-windows10/19792>\
**Category:** Builder\
**Created:** [January 20, 2021, 7:38pm UTC](https://discourse.psychopy.org/t/preferences-menu-issue-2020v-2-10-windows10/19792 "2021-01-20T19:38:55Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![val58](https://avatars.discourse-cdn.com/v4/letter/v/f9ae1b/32.png) [@val58](https://discourse.psychopy.org/u/val58)\
**Post date:** [January 20, 2021, 7:38pm UTC](https://discourse.psychopy.org/t/preferences-menu-issue-2020v-2-10-windows10/19792/1 "2021-01-20T19:38:55Z")

</div>

Hello,

I recently upgraded PsychoPy on my Windows 10 machine using the standalone file. I did uninstall an older version first. However, when I click on File \> Preferences, I get the error below and cannot even change the order of my sound libraries.

I also get related errors when I try to run any task with sound (it goes to the first screen of the task, then kicks me out and gives me four backend\_pyo.py errors, 3 of them the same as below).

Am I missing a sound library (pyo looks installed…), or another important section of code?

I will also copy what is in the “Help\> System Info” menu below the error codes.

Thank you for any help.

Val

======================  
[WHEN CLICKING FILE\>PREFERENCES]

```auto
PsychoPy encountered an unhandled internal error!... Details:

Traceback (most recent call last):
  File "C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\app\_psychopyApp.py", line 767, in showPrefs
    prefsDlg = PreferencesDlg(app=self)
  File "C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\app\preferencesDlg.py", line 543, in __init__
    devnames = sorted(sound.getDevices('output'))
  File "C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\sound\backend_pyo.py", line 135, in getDevices
    inputs, outputs = get_devices_infos()
  File "C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\sound\backend_pyo.py", line 93, in get_devices_infos
    devices = _query_devices()
  File "C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\sound\backend_pyo.py", line 86, in _query_devices
    info[v.strip().split(": ")[0]] = v.strip().split(": ")[1]
IndexError: list index out of range

```

==============================  
[SYSTEM INFO]  
PsychoPy 2020.2.10

Paths to files on the system:  
userPrefsFile: C:\Users\Val\AppData\Roaming\psychopy3\userPrefs.cfg  
appDataFile: C:\Users\Val\AppData\Roaming\psychopy3\appData.cfg  
demos: C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\demos  
appFile: C:\Users\Val\AppData\Local\PsychoPy3\lib\site-packages\psychopy\app\PsychoPy.py

System Info:  
Operating System: Windows-10-10.0.19041-SP0  
Processor: Intel64 Family 6 Model 142 Stepping 12, GenuineIntel  
CPU freq (MHz): 2304.0  
CPU cores: 4 (physical), 8 (logical)  
Installed memory: 16999436288 (Total), 6810079232 (Available)

Python info:  
Executable path: C:\Users\Val\AppData\Local\PsychoPy3\pythonw.exe  
Version: 3.6.6 (v3.6.6:4cf1f54eb7, Jun 27 2018, 03:37:03) [MSC v.1900 64 bit (AMD64)]  
(Selected) Installed Packages:  
numpy (1.18.1)  
scipy (1.4.1)  
matplotlib (3.3.0)  
pyglet (1.3.3)  
PyGLFW (1.7.0)  
pyo 0.9.7  
psychtoolbox (3.0.16)  
wxPython (4.1.0)

OpenGL Info:  
Vendor: Intel  
Rendering engine: Intel® UHD Graphics  
OpenGL version: 4.6.0 - Build 26.20.100.8141  
Shaders supported: True  
(Selected) Extensions:  
GL\_ARB\_multitexture: True  
GL\_EXT\_framebuffer\_object: True  
GL\_ARB\_fragment\_program: True  
GL\_ARB\_shader\_objects: True  
GL\_ARB\_vertex\_shader: True  
GL\_ARB\_texture\_non\_power\_of\_two: True  
GL\_ARB\_texture\_float: True  
GL\_STEREO: False  
max vertices in vertex array: 1048576

---

<div class="post-metadata">

**Author:** ![val58](https://avatars.discourse-cdn.com/v4/letter/v/f9ae1b/32.png) [@val58](https://discourse.psychopy.org/u/val58)\
**Post date:** [January 27, 2021, 6:24pm UTC](https://discourse.psychopy.org/t/preferences-menu-issue-2020v-2-10-windows10/19792/2 "2021-01-27T18:24:07Z")

</div>

Is there a way to manually download just the pyo library and replace my files? I’m thinking maybe that would fix the problem, but I’m stuck right now because I can’t run any experiments with sound (unless they are uploaded to Pavlovia by someone not having this issue).