# UDT Value Source Changed Itself to Memory

**URL:** <https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082>\
**Category:** Ignition\
**Created:** [May 26, 2022, 4:43pm UTC](https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082 "2022-05-26T16:43:27Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![dion.botha](https://avatars.discourse-cdn.com/v4/letter/d/46a35a/32.png) [@dion.botha](https://forum.inductiveautomation.com/u/dion.botha)\
**Post date:** [May 26, 2022, 4:43pm UTC](https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082/1 "2022-05-26T16:43:28Z")

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Hello,

This morning I noticed that for a couple of UDTs who’s tags come from several instances of a controller’s OPC-UA server that I configured a long while ago, the Value Source changed itself from OPC to Memory… I’m guessing this happened after a past Ignition upgrade(?)

What’s really weird is that in the tag browser, the value’s are still coming through as if they were configured as OPC tags…

Anyone else experiencing this?

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**Author:** ![dion.botha](https://avatars.discourse-cdn.com/v4/letter/d/46a35a/32.png) [@dion.botha](https://forum.inductiveautomation.com/u/dion.botha)\
**Post date:** [May 26, 2022, 5:43pm UTC](https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082/2 "2022-05-26T17:43:46Z")

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When I change the tags Value Source from Memory back to OPC, the Data Type, OPC Server and OPC Item Path properties come back how I initially set them up so I have resolved.

Still curious as to why this happened in the first place.

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**Author:** ![dion.botha](https://avatars.discourse-cdn.com/v4/letter/d/46a35a/32.png) [@dion.botha](https://forum.inductiveautomation.com/u/dion.botha)\
**Post date:** [May 26, 2022, 6:13pm UTC](https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082/3 "2022-05-26T18:13:12Z")

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Interestingly, it wasn’t all tags in the UDT that this happened with only tags in certain folders…

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**Author:** ![andrews](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@andrews](https://forum.inductiveautomation.com/u/andrews)\
**Post date:** [May 26, 2022, 8:53pm UTC](https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082/4 "2022-05-26T20:53:30Z")

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Sounds like something to discuss with support as it may be a bug.

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**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:** [May 27, 2022, 12:47am UTC](https://forum.inductiveautomation.com/t/udt-value-source-changed-itself-to-memory/60082/5 "2022-05-27T00:47:22Z")

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Anything captured in the audit log?