# The tag does not support writing

**URL:** <https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641>\
**Category:** Ignition\
**Created:** [June 27, 2018, 12:07pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641 "2018-06-27T12:07:32Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![oisin.gribben](https://avatars.discourse-cdn.com/v4/letter/o/9d8465/32.png) [@oisin.gribben](https://forum.inductiveautomation.com/u/oisin.gribben)\
**Post date:** [June 27, 2018, 12:07pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/1 "2018-06-27T12:07:32Z")

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Hi,  
I keep getting an error when writing to a tag parameter. It says The Tag does not support writing.  
Is there any way to fix this

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**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\
**Post date:** [June 27, 2018, 5:46pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/2 "2018-06-27T17:46:20Z")

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What kind of tag is it? Is it set to read-only mode, or read/write? Got a screenshot?

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**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:** [June 27, 2018, 7:34pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/3 "2018-06-27T19:34:16Z")

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And which parameter are you writing to? Not all attributes can be directly written.

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**Author:** ![oisin.gribben](https://avatars.discourse-cdn.com/v4/letter/o/9d8465/32.png) [@oisin.gribben](https://forum.inductiveautomation.com/u/oisin.gribben)\
**Post date:** [June 28, 2018, 9:52am UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/4 "2018-06-28T09:52:12Z")

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Hi,  
I have attached a snippet of the parameter I want to change.

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/d/d27473793eb22b2256cc8dab4e5a43fa8298fb91.png)

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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:** [June 28, 2018, 2:52pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/5 "2018-06-28T14:52:15Z")

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UDT parameters need to be changed using the `system.tag.editTag` function: [https://docs.inductiveautomation.com/display/DOC79/system.tag.editTag](https://docs.inductiveautomation.com/display/DOC79/system.tag.editTag)

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**Author:** ![oisin.gribben](https://avatars.discourse-cdn.com/v4/letter/o/9d8465/32.png) [@oisin.gribben](https://forum.inductiveautomation.com/u/oisin.gribben)\
**Post date:** [June 28, 2018, 2:54pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/6 "2018-06-28T14:54:34Z")

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That is what I’m using. I have attached the script below.

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/7/77f81dbada4f73d6ad7e710375fc5ec414e69742.png)

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<div class="post-metadata">

**Author:** ![ethomason](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ethomason/32/43338_2.png) [@ethomason](https://forum.inductiveautomation.com/u/ethomason)\
**Post date:** [June 28, 2018, 2:59pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/7 "2018-06-28T14:59:45Z")

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> [@oisin.gribben](#):
>
> That is what I'm using.

You're using system.tag.write, not system.tag.editTag

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**Author:** ![oisin.gribben](https://avatars.discourse-cdn.com/v4/letter/o/9d8465/32.png) [@oisin.gribben](https://forum.inductiveautomation.com/u/oisin.gribben)\
**Post date:** [June 28, 2018, 3:05pm UTC](https://forum.inductiveautomation.com/t/the-tag-does-not-support-writing/18641/8 "2018-06-28T15:05:53Z")

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My bad thanks for pointing it out 🙂