# Error when saving data on Pavlovia

**URL:** <https://discourse.psychopy.org/t/error-when-saving-data-on-pavlovia/13875>\
**Category:** Online experiments\
**Tags:** data\
**Created:** [June 2, 2020, 10:50am UTC](https://discourse.psychopy.org/t/error-when-saving-data-on-pavlovia/13875 "2020-06-02T10:50:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Elena1](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/elena1/32/8030_2.png) [@Elena1](https://discourse.psychopy.org/u/Elena1)\
**Post date:** [June 2, 2020, 10:50am UTC](https://discourse.psychopy.org/t/error-when-saving-data-on-pavlovia/13875/1 "2020-06-02T10:50:27Z")

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URL of experiment: [https://pavlovia.org/elena/fastx](https://pavlovia.org/elena/fastx)

Description of the problem: I try to post this again. I have been running the experiment for 3/4 days now and a lot of participants complain that they arrive at the end and an error appears, saying that their data cannot be saved.  
Any suggestion?

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**Author:** ![Elena1](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/elena1/32/8030_2.png) [@Elena1](https://discourse.psychopy.org/u/Elena1)\
**Post date:** [June 3, 2020, 4:25pm UTC](https://discourse.psychopy.org/t/error-when-saving-data-on-pavlovia/13875/2 "2020-06-03T16:25:39Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/d/7/d79310afd2066e6a6e045722028d0568622ce593.jpeg)

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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:** [June 3, 2020, 5:48pm UTC](https://discourse.psychopy.org/t/error-when-saving-data-on-pavlovia/13875/3 "2020-06-03T17:48:57Z")

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What sort of participant numbers are you asking them to use? There seem to be a lot of fore slashes in the data file name.