# Dash app does not update data from CSV file

**URL:** <https://community.plotly.com/t/dash-app-does-not-update-data-from-csv-file/50454>\
**Category:** Dash Python\
**Created:** [February 25, 2021, 9:06pm UTC](https://community.plotly.com/t/dash-app-does-not-update-data-from-csv-file/50454 "2021-02-25T21:06:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vinoroy70](https://avatars.discourse-cdn.com/v4/letter/v/b487fb/32.png) [@vinoroy70](https://community.plotly.com/u/vinoroy70)\
**Post date:** [February 25, 2021, 9:06pm UTC](https://community.plotly.com/t/dash-app-does-not-update-data-from-csv-file/50454/1 "2021-02-25T21:06:55Z")

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I have created a Dash app that reads a CSV file to produce a DashTable. The table is updated every 15 minutes using a batch process independant of the Dash app. When I reload the Dash app it still displays the old table even though the csv file has been updated by the batch program. To up date the Dash table I need to kill the Dash server and start it up again. Why is this and how can I change the app so that it sees the updated csv file.

Thank you

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<div class="post-metadata">

**Author:** ![Eduardo](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/eduardo/32/13310_2.png) [@Eduardo](https://community.plotly.com/u/Eduardo)\
**Post date:** [February 25, 2021, 9:54pm UTC](https://community.plotly.com/t/dash-app-does-not-update-data-from-csv-file/50454/2 "2021-02-25T21:54:27Z")

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@vinoroy70

I think is related with the way Dash works using the cache (not enough technical knowledge 🥴).

Try using dcc.Interval to update the table every 15 minutes.