# 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:** 1\
**Showing post:** 2

<div class="post-metadata">

**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")

</div>

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. …

{ Please don't double post. It is against [this forum's rules](https://forum.inductiveautomation.com/faq). }

---

_[View the full topic](https://forum.inductiveautomation.com/t/no-trend-data-source-available-in-ignition-8-1-17/86053)._