# Pavlovia: only download relevant stimuli for participant

**URL:** <https://discourse.psychopy.org/t/pavlovia-only-download-relevant-stimuli-for-participant/13067>\
**Category:** Online experiments\
**Created:** [May 6, 2020, 9:20am UTC](https://discourse.psychopy.org/t/pavlovia-only-download-relevant-stimuli-for-participant/13067 "2020-05-06T09:20:56Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![jon](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/jon/32/22_2.png) [@jon](https://discourse.psychopy.org/u/jon)\
**Post date:** [June 19, 2020, 8:07am UTC](https://discourse.psychopy.org/t/pavlovia-only-download-relevant-stimuli-for-participant/13067/3 "2020-06-19T08:07:36Z")

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I’m afraid we haven’t built a way to vary the files that get delivered on a per-participant basis. We will be looking into options to fetch additional files during the experiment but there are then extra things to worry about like making sure the right files are fully received before they are needed, given the impotance of not suddenly “buffering” while running the study.

@DavidB-UWA your issue sounds like a problem with sync no longer working if you’ve removed files from the project but they are still being sent. When files are pushed to [gitlab.pavlovia.org](http://gitlab.pavlovia.org) they are then pulled over by [run.pavlovia.org](http://run.pavlovia.org) using git. Sometimes a merge conflict occurs there (the cause of which we haven’t worked out) and from then on the sync fails. My guess is that your study has had this problem. Could you leave it there for us to investigate but then push the study to a fresh project\* so that sync starts working again?

cheers,  
Jon

\*The safest way to make sure this happens is to duplicate your experiment folder and then, in the new copy, go and delete the hidden folder called `.git` from inside it, then open the study in PsychoPy and sync as before so that it will ask to create a new project.

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