# Uncertain\_InitialValue for large tag provider

**URL:** <https://forum.inductiveautomation.com/t/uncertain-initialvalue-for-large-tag-provider/73480>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [May 9, 2023, 3:01pm UTC](https://forum.inductiveautomation.com/t/uncertain-initialvalue-for-large-tag-provider/73480 "2023-05-09T15:01:19Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![sankalp.yadav](https://avatars.discourse-cdn.com/v4/letter/s/7ea924/32.png) [@sankalp.yadav](https://forum.inductiveautomation.com/u/sankalp.yadav)\
**Post date:** [July 1, 2026, 4:41am UTC](https://forum.inductiveautomation.com/t/uncertain-initialvalue-for-large-tag-provider/73480/21 "2026-07-01T04:41:37Z")

</div>

Hi,

I'm facing the same issue with a similar architecture: **PLC → Kepware → Ignition**.

Whenever I make changes in Kepware, such as adding or updating tags, the tag quality in Ignition changes to **Uncertain\_LastKnownValue** , and the subscriptions stop updating. The subscriptions only resume after restarting the Kepware Runtime Services.

I've been unable to identify the root cause or find a resolution.

Has anyone experienced this issue or found a fix? Any suggestions would be greatly appreciated.

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