# GRAFANA Dashboard does not display Data

**URL:** <https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378>\
**Category:** InfluxDB\
**Created:** [October 11, 2023, 2:03pm UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378 "2023-10-11T14:03:31Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![secretgarden2](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@secretgarden2](https://community.grafana.com/u/secretgarden2)\
**Post date:** [October 11, 2023, 2:03pm UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/1 "2023-10-11T14:03:31Z")

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Hello  
please should be informed that telegraf how all data of measurements however in grafana does not show all data

 ![image](https://us1.discourse-cdn.com/grafana/original/3X/a/7/a7c84923f08bba8d625f6db0a366869f33fff8ee.png)

 ![grafana](https://us1.discourse-cdn.com/grafana/original/3X/3/e/3e00692d3ec4dfb655e12879b375175924cbb94d.png)

can you help please

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<div class="post-metadata">

**Author:** ![secretgarden2](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@secretgarden2](https://community.grafana.com/u/secretgarden2)\
**Post date:** [October 11, 2023, 2:08pm UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/2 "2023-10-11T14:08:17Z")

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espechly these lines not displayed

Serial\_Number=“3322659325”  
,Systemname=“WorkCentre 5330 RDJ1”

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<div class="post-metadata">

**Author:** ![grant2](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/grant2/32/42281_2.png) [@grant2](https://community.grafana.com/u/grant2)\
**Post date:** [October 11, 2023, 9:37pm UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/3 "2023-10-11T21:37:15Z")

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What is shown if you hover over the red error icon?

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<div class="post-metadata">

**Author:** ![secretgarden2](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@secretgarden2](https://community.grafana.com/u/secretgarden2)\
**Post date:** [October 12, 2023, 2:15am UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/4 "2023-10-12T02:15:32Z")

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I will check and back to you with an answer

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<div class="post-metadata">

**Author:** ![secretgarden2](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@secretgarden2](https://community.grafana.com/u/secretgarden2)\
**Post date:** [October 12, 2023, 8:50am UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/5 "2023-10-12T08:50:17Z")

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hello here is the error displayed

grafana unsupported mean iterator type: \*query.stringInterruptIterator

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<div class="post-metadata">

**Author:** ![grant2](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/grant2/32/42281_2.png) [@grant2](https://community.grafana.com/u/grant2)\
**Post date:** [October 12, 2023, 9:12am UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/6 "2023-10-12T09:12:37Z")

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> [@secretgarden2](#):
>
> grafana unsupported mean iterator type: \*query.stringInterruptIterator

Try removing the `GROUP BY time($__interval) fill(null)` and see what happens.

Source: [InfluxDB Error: unsupported mean iterator type: \*query.booleanInterruptIterator - InfluxDB 1 - InfluxData Community Forums](https://community.influxdata.com/t/influxdb-error-unsupported-mean-iterator-type-query-booleaninterruptiterator/23140)

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<div class="post-metadata">

**Author:** ![secretgarden2](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@secretgarden2](https://community.grafana.com/u/secretgarden2)\
**Post date:** [October 12, 2023, 11:06pm UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/7 "2023-10-12T23:06:16Z")

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Thanks you very much

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<div class="post-metadata">

**Author:** ![jangaraj](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/jangaraj/32/39197_2.png) [@jangaraj](https://community.grafana.com/u/jangaraj)\
**Post date:** [October 13, 2023, 3:48am UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/8 "2023-10-13T03:48:50Z")

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systemname is string field and it doesn’t make sense to calculate mean value from the string.  
Use some numeric field in mean agg function.

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<div class="post-metadata">

**Author:** ![grant2](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/grant2/32/42281_2.png) [@grant2](https://community.grafana.com/u/grant2)\
**Post date:** [October 13, 2023, 10:08am UTC](https://community.grafana.com/t/grafana-dashboard-does-not-display-data/105378/9 "2023-10-13T10:08:31Z")

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@secretgarden2

If the above fixed the issue, please mark it as Solution so others can find this in the future.