# Experiment Stuck on experiment initialising

**URL:** <https://discourse.psychopy.org/t/experiment-stuck-on-experiment-initialising/34195>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [April 2, 2023, 8:37pm UTC](https://discourse.psychopy.org/t/experiment-stuck-on-experiment-initialising/34195 "2023-04-02T20:37:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![reout](https://avatars.discourse-cdn.com/v4/letter/r/b19c9b/32.png) [@reout](https://discourse.psychopy.org/u/reout)\
**Post date:** [April 2, 2023, 8:37pm UTC](https://discourse.psychopy.org/t/experiment-stuck-on-experiment-initialising/34195/1 "2023-04-02T20:37:12Z")

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URL of experiment:

Description of the problem:  
hi im running an experiment on spychopy builder 2022.2.4,on my computer my experiment works but when i try to pilot it on pavlovia its stuck on the initialising stage. I tried to solve the problem by reading your answer but nothing helped.  
when im running the experiment on my computer this alert appears

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/b/3/b357b7096a23fc6095bbaca5cece1129b419e412.png)

can someone help me here to solve this problem ?

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**Author:** ![JensBoelte](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/jensboelte/32/9060_2.png) [@JensBoelte](https://discourse.psychopy.org/u/JensBoelte)\
**Post date:** [April 3, 2023, 10:16am UTC](https://discourse.psychopy.org/t/experiment-stuck-on-experiment-initialising/34195/2 "2023-04-03T10:16:52Z")

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Hello

get rid of your duplicate variable names. Do you define something in a Begin Experiment tab?

Best wishes Jens

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<div class="post-metadata">

**Author:** ![reout](https://avatars.discourse-cdn.com/v4/letter/r/b19c9b/32.png) [@reout](https://discourse.psychopy.org/u/reout)\
**Post date:** [April 3, 2023, 12:16pm UTC](https://discourse.psychopy.org/t/experiment-stuck-on-experiment-initialising/34195/3 "2023-04-03T12:16:46Z")

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yes this is the code in the befin expriment tab

 ![Capture d'écran 2023-04-03 151233](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/d/5/d540253913426743d6de31ad047660386a90ae04.png)  
 ![Capture d'écran 2023-04-03 151313](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/c/1/c18baa06e71e7d9d883fa8c2e5fbfea7abd5fafc.png)

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<div class="post-metadata">

**Author:** ![JensBoelte](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/jensboelte/32/9060_2.png) [@JensBoelte](https://discourse.psychopy.org/u/JensBoelte)\
**Post date:** [April 3, 2023, 3:24pm UTC](https://discourse.psychopy.org/t/experiment-stuck-on-experiment-initialising/34195/4 "2023-04-03T15:24:47Z")

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Hello

what version do you use? See the crib sheet for the appropriate JS-code. You could compile the JS-code and check the relevant line in your code or check the code online.

> **[PsychoPy Python to Javascript crib sheet 2021](https://docs.google.com/document/d/183xmwDgSbnJZHMGf3yWpieV9Bx8y7fOCm3QKkMOOXFQ/edit)**
>
> This document contains a crib sheet for PsychoPy version 2021.1.3 and 2021.2.2. It contains instructions for adding a JavaScript only code component to a routine and for using it to sync the Python code to Pavlovia.

Are there space in front of ’ norm units’, ’ pixels’, ’ height units’?

Did you get rid of the duplicate variable names?

Best wishes Jens