# Error when opening experiment in different version of Psychopy

**URL:** <https://discourse.psychopy.org/t/error-when-opening-experiment-in-different-version-of-psychopy/31487>\
**Category:** Builder\
**Created:** [October 21, 2022, 10:51am UTC](https://discourse.psychopy.org/t/error-when-opening-experiment-in-different-version-of-psychopy/31487 "2022-10-21T10:51:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![beckyttyler](https://avatars.discourse-cdn.com/v4/letter/b/edb3f5/32.png) [@beckyttyler](https://discourse.psychopy.org/u/beckyttyler)\
**Post date:** [October 21, 2022, 10:51am UTC](https://discourse.psychopy.org/t/error-when-opening-experiment-in-different-version-of-psychopy/31487/1 "2022-10-21T10:51:31Z")

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**OS** : Mac Mojave 10.14.6  
**PsychoPy version** (e.g. 1.84.x): psychopy 3 v2021.2.3

**Standard Standalone? (y/n)** If not then what?: Not sure

**What are you trying to achieve?:**  
I am trying to run an experiment built on a Macbook with the version 3 v2021.2.3 on a Windows laptop at the university. The university laptop runs Psychopy v3.0.0b6 on Windows.

**What did you try to make it work?:**  
I know that you can go to settings and change the version and then run the experiment, but there is no cog wheel/settings available on the Psychopy v3.0.0b6 on the university laptop. Found a few posts of the forum but nothing that resolved my issue.

 ![Psychopy](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/8/4/8465fff70d594b371f9ca34c7d1e42870675a015.jpeg)

**What specifically went wrong when you tried that?:**  
At the moment I am getting a error message (attached) in addition to a black window with alot of text with WARNING Parameter ‘X’ is not known to this version of psychopy but has come from your experiment (saved by a future version of Psychopy). This experiment may not run correctly in the current version.

When I close this black window of warnings it quits the whole experiment.

Any help would be much appreciated.