# No trend data source available in ignition 8.1.17

**URL:** <https://forum.inductiveautomation.com/t/no-trend-data-source-available-in-ignition-8-1-17/86053>\
**Category:** Ignition\
**Created:** [February 20, 2024, 8:41pm UTC](https://forum.inductiveautomation.com/t/no-trend-data-source-available-in-ignition-8-1-17/86053 "2024-02-20T20:41:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Braulio\_Jose\_Alcanta](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@Braulio\_Jose\_Alcanta](https://forum.inductiveautomation.com/u/Braulio_Jose_Alcanta)\
**Post date:** [February 20, 2024, 8:41pm UTC](https://forum.inductiveautomation.com/t/no-trend-data-source-available-in-ignition-8-1-17/86053/1 "2024-02-20T20:41:39Z")

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Running 8.1.17, I'm having the same issue where i dont need the **drv:**

histprov:DB:/drv:ignition-ussfa1igntpap01:default:/tag:bb/cl4/line\_speed\_sp #Bad

histprov:DB:/ignition-ussfa1igntpap01:default:/tag:bb/cl4/line\_speed\_sp #Good

Once I removed **drv:** the tags starts displaying in the chart. Otherwise, it would say

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/4/846f631850b26e2e29660b3fc4738a3a2aac86ec.png)

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [February 20, 2024, 8:57pm UTC](https://forum.inductiveautomation.com/t/no-trend-data-source-available-in-ignition-8-1-17/86053/2 "2024-02-20T20:57:02Z")

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See my comment in that topic you revived:

> [@Ignition Perspective Powerchart tag path is not returning the correct case](https://forum.inductiveautomation.com/t/ignition-perspective-powerchart-tag-path-is-not-returning-the-correct-case/56363/9):
>
> By removing drv:, you are causing the qualified path parser to discard ignition-ussfa1igntpap01:default. (Really, causing that string to be considered a qualifier.) Since the :/tag: fragment supplies a tag path, and a tag path is usually sufficient to obtain the parts supplied by :/drv, it is working by chance. If you then edit the pen in the PowerChart, it likely is "fixing" the drv to be syntactically correct. You should inspect that, and compare to the part you are forcing it to ignore. …

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