# \[BUG?\] Binding to invalid prop returns Bad\_Stale quality

**URL:** <https://forum.inductiveautomation.com/t/bug-binding-to-invalid-prop-returns-bad-stale-quality/104210>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [March 26, 2025, 4:16am UTC](https://forum.inductiveautomation.com/t/bug-binding-to-invalid-prop-returns-bad-stale-quality/104210 "2025-03-26T04:16:17Z")\
**Posts on this page:** 1\
**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:** [March 26, 2025, 4:16am UTC](https://forum.inductiveautomation.com/t/bug-binding-to-invalid-prop-returns-bad-stale-quality/104210/1 "2025-03-26T04:16:17Z")

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I saw this one in perspective, maybe applies to vison too, where I bound to an expression with if statememt containing `{view.custon.propname}` with a typo in `custom`, and the quality returned was **bad stale** which took a few hours to finally realise it was just a typo... The prop name itself was bound to a tag, so I was chasing a ghost trying to find an issue with the tag. This quality was extremely deceptive