# Parameter Reading operator (Path Structure)

**URL:** <https://forum.inductiveautomation.com/t/parameter-reading-operator-path-structure/57229>\
**Category:** Ignition\
**Tags:** perspective, ignition81\
**Created:** [March 15, 2022, 8:07pm UTC](https://forum.inductiveautomation.com/t/parameter-reading-operator-path-structure/57229 "2022-03-15T20:07:36Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Adrian\_Bravo](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@Adrian\_Bravo](https://forum.inductiveautomation.com/u/Adrian_Bravo)\
**Post date:** [March 15, 2022, 8:07pm UTC](https://forum.inductiveautomation.com/t/parameter-reading-operator-path-structure/57229/1 "2022-03-15T20:07:36Z")

</div>

Hi All,

I’ve been doing some work with UDT, Parameters and nested UDT. I have encountered a very curious and strange situation/problem so i need some help in the form of a clarification.

Sometimes i change Parameters from the Tag Browser, and i have some strange bugs where the parameters changes by a second and then returns to its previous value. This is usually when using UDT Parameters.

Today i have changed this parameter (Inverters\_Qty) from 8 to 5, as the image shows, the tag browser indicates the new value (5), but perspective and binding editor is showing old value (8)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/d/cd153ba24575c7e4a03663d3cd52f909b527d9d9.png)

Debugging and trying to find the problem, i have encountered that if i change the path from “Path/to/tag/Parameters/param1” to “Path/to/tag/Parameters.param1” the new value appears, but using slash operator the old value is kept.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/a/0abdf567f8fb329b2cbb360f607c35d021e4be29.png)

I think the same situation happens with scripts and tag bindings in expressions (as i remember, i have to double check this again).

Is there a technical reason why is this happening? Or is a bug? What is the correct way to read a tag parameter? Slash operator or Dot operator, both?

Thank you in advance.

Regards.

---

<div class="post-metadata">

**Author:** ![cmallonee](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cmallonee/32/6416_2.png) [@cmallonee](https://forum.inductiveautomation.com/u/cmallonee)\
**Post date:** [March 15, 2022, 9:11pm UTC](https://forum.inductiveautomation.com/t/parameter-reading-operator-path-structure/57229/2 "2022-03-15T21:11:25Z")

</div>

I would need to look into this more to really weigh-in, but anytime I’m reading properties I use slashes for directories/files/tags and dots for attributes/properties.

This seems very wrong to me (if it even works):

```auto
[provider]path/path/path/tag/value

```

And this is the way I would always do it personally:

```auto
[provider]path/path/path/tag.value

```