# Error when when when terminating the experiment

**URL:** <https://discourse.psychopy.org/t/error-when-when-when-terminating-the-experiment/44513>\
**Category:** Online experiments\
**Created:** [April 7, 2025, 3:32pm UTC](https://discourse.psychopy.org/t/error-when-when-when-terminating-the-experiment/44513 "2025-04-07T15:32:22Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [April 7, 2025, 3:43pm UTC](https://discourse.psychopy.org/t/error-when-when-when-terminating-the-experiment/44513/2 "2025-04-07T15:43:03Z")

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What I can see is that your expInfo dialogue box doesn’t have a participant field.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/6/e/6e61260fd8098df08525de4253e36a66bbbf6afc.png)

> [@Wakefield's Daily Tips](https://discourse.psychopy.org/t/wakefields-daily-tips/43371/21):
>
> Skipping dialogue boxes online At the start of every PsychoJS experiment you get a dialogue box asking for your participant number, etc. This shouldn’t be hidden and I would recommend that you don’t change the default key “participant” since it gets used in the data file name. On the other hand you might want your participant to launch the study straight away, especially if you have already assigned a value for participant, etc. using daisy chaining or a custom participation link. If you want …

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