# Ignition 7.9 to 8.1 Upgrade issue with Expression binding

**URL:** <https://forum.inductiveautomation.com/t/ignition-7-9-to-8-1-upgrade-issue-with-expression-binding/45609>\
**Category:** Ignition\
**Created:** [April 14, 2021, 7:31pm UTC](https://forum.inductiveautomation.com/t/ignition-7-9-to-8-1-upgrade-issue-with-expression-binding/45609 "2021-04-14T19:31:37Z")\
**Posts on this page:** 1\
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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:** [April 14, 2021, 10:20pm UTC](https://forum.inductiveautomation.com/t/ignition-7-9-to-8-1-upgrade-issue-with-expression-binding/45609/2 "2021-04-14T22:20:07Z")

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See here. Some other gotchas there too

> [@Undocumented changes when migrating from v7 to v8](https://forum.inductiveautomation.com/t/undocumented-changes-when-migrating-from-v7-to-v8/38044/1):
>
> Tag quality string values have changed. E.g. “Not Found” ==\> “Bad\_NotFound”; “Disabled” ==\> “Bad\_Disabled”. Also, integer values appear to have changed as well, such as if you were checking a tag’s quality value = 404 for not found; this no longer works.

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