# System.tag.configure dataset regression in 8.3

**URL:** <https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013>\
**Category:** Ignition\
**Created:** [April 10, 2026, 8:28pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013 "2026-04-10T20:28:46Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![Noah\_Burnette](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/noah_burnette/32/83777_2.png) [@Noah\_Burnette](https://forum.inductiveautomation.com/u/Noah_Burnette)\
**Post date:** [April 10, 2026, 8:28pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/1 "2026-04-10T20:28:47Z")

</div>

Hi all, currently upgrading from 8.1.45 to 8.3.4 and noticed an issue with configuring datasets.

Below is a simple example:

```python
header = ['myColumn']
rows = [[1], [2]]
dataset = system.dataset.toDataSet(header, rows)

system.tag.configure(
	"[default]Test", [ {
                    "valueSource": "memory",
                    "name": "Test",
                    "tagType": "AtomicTag",
                    "value": dataset,
                    "dataType": "DataSet"
                }])

```

When ran on an 8.1 gateway I get the expected behavior along with `[Good]` output:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/b/7bb6ddc2d1a9c00b97f7fe6e9984501b4a2a7b47.png)

When ran on an 8.3 gateway I get a `null` and a `[Good]` from the output:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/d/3dc66bea046b586055e333c99ce6ab1630064591.png)

Has anyone also ran into this issue? We rely heavily on this behavior as we cache master data in the tags using this method.

Thanks in advance!

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [April 10, 2026, 8:38pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/2 "2026-04-10T20:38:57Z")

</div>

Where are you running this script - in the designer, or on the gateway?

---

<div class="post-metadata">

**Author:** ![Noah\_Burnette](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/noah_burnette/32/83777_2.png) [@Noah\_Burnette](https://forum.inductiveautomation.com/u/Noah_Burnette)\
**Post date:** [April 10, 2026, 8:44pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/3 "2026-04-10T20:44:47Z")

</div>

Hi Paul,

Running on the script on the designer but initially noticed while it was running gateway scoped. Didn't observe any difference in scope.

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<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [April 10, 2026, 8:46pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/4 "2026-04-10T20:46:54Z")

</div>

Are you able to try the 8.3.5 nightly/RC, by any chance?

8.3.5 changes the way the tag system serializes objects, which might be the root cause here. I'm just making educated guesses though - I haven't actually plugged this in to the IDE to see the true root cause.

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<div class="post-metadata">

**Author:** ![Noah\_Burnette](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/noah_burnette/32/83777_2.png) [@Noah\_Burnette](https://forum.inductiveautomation.com/u/Noah_Burnette)\
**Post date:** [April 10, 2026, 9:16pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/5 "2026-04-10T21:16:55Z")

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Tested an ephemeral `8.3.5-rc1` gateway and still same behavior

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/6/66ca3712183a6ad87e02ca6faac1bbd35ae29b31.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/8/3895651f7ff50bedabc92217296a4aa5156bdee1.png)

Tested `8.3-nightly` (8.3.6-SNAPSHOT).

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/c/6cdcfd770cfa477ae2474c4d5de1f0e10b02fc5d.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/9/191233fbcf60eeb4f0c45d4d31afa15a384bc62f.png)

Please let me know if there is any additionally troubleshooting steps needed!

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<div class="post-metadata">

**Author:** ![Noah\_Burnette](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/noah_burnette/32/83777_2.png) [@Noah\_Burnette](https://forum.inductiveautomation.com/u/Noah_Burnette)\
**Post date:** [April 10, 2026, 11:54pm UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/6 "2026-04-10T23:54:48Z")

</div>

Support ticket that I filed confirmed that this is a bug. Work around given by support is to write to the tag directly `system.tag.write*` while they work on filing a bug report.

Thanks for the initial support Paul 👍

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<div class="post-metadata">

**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [April 11, 2026, 3:30am UTC](https://forum.inductiveautomation.com/t/system-tag-configure-dataset-regression-in-8-3/115013/7 "2026-04-11T03:30:48Z")

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(just note you won't be able to do this for read-only tags, which is where configure comes in)