# changeNotification error in logs after upgrade to 8.1.18

**URL:** <https://forum.inductiveautomation.com/t/changenotification-error-in-logs-after-upgrade-to-8-1-18/61484>\
**Category:** Ignition\
**Created:** [July 4, 2022, 1:37pm UTC](https://forum.inductiveautomation.com/t/changenotification-error-in-logs-after-upgrade-to-8-1-18/61484 "2022-07-04T13:37:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lewis.storey](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lewis.storey/32/15026_2.png) [@lewis.storey](https://forum.inductiveautomation.com/u/lewis.storey)\
**Post date:** [July 4, 2022, 1:37pm UTC](https://forum.inductiveautomation.com/t/changenotification-error-in-logs-after-upgrade-to-8-1-18/61484/1 "2022-07-04T13:37:50Z")

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We have just upgraded two local dev servers from 8.1.13 to 8.1.18 and although one of them is fine the other is producing a constant stream of changeNotification errors.

We can’t nail down the source of these errors beyond possibly being something to do with the UDTs.

 ![Screenshot 2022-07-04 132209](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/0/20ec081e75039f6d5c8834452d0fa7b07d386895.png)  
 ![Screenshot 2022-07-04 134249](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/a/6a248ec44ca18c65a60f364347423dd64cd3c689.png)

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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:** [July 5, 2022, 4:02pm UTC](https://forum.inductiveautomation.com/t/changenotification-error-in-logs-after-upgrade-to-8-1-18/61484/2 "2022-07-05T16:02:01Z")

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I would encourage you to contact support, if you haven’t already.