# New version of Psychopy doesn't compile script

**URL:** <https://discourse.psychopy.org/t/new-version-of-psychopy-doesnt-compile-script/15987>\
**Category:** Builder\
**Created:** [August 26, 2020, 3:57pm UTC](https://discourse.psychopy.org/t/new-version-of-psychopy-doesnt-compile-script/15987 "2020-08-26T15:57:44Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![LukasPsy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/lukaspsy/32/4582_2.png) [@LukasPsy](https://discourse.psychopy.org/u/LukasPsy)\
**Post date:** [August 26, 2020, 5:31pm UTC](https://discourse.psychopy.org/t/new-version-of-psychopy-doesnt-compile-script/15987/3 "2020-08-26T17:31:17Z")

</div>

I have a quick fix: As the error says, Psychopy is looking for the prefs variable `useRunner`. The variable is not set in your userPrefs and you cannot set it through the builder interface for now. You can, however, go to your preference file `userPrefs.cfg`, which will be in a folder like %APPDATA%psychopy3 on Windows and ~/.psychopy3 on Linux/MacOS and create an entry for useRunner there.  
In this file, add the line `useRunner = False` somewhere under this heading:

```auto
# General settings
[general]

```

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_[View the full topic](https://discourse.psychopy.org/t/new-version-of-psychopy-doesnt-compile-script/15987)._