# Expression Binding -- Error when binding to a property on different component

**URL:** <https://forum.inductiveautomation.com/t/expression-binding-error-when-binding-to-a-property-on-different-component/37269>\
**Category:** Ignition\
**Tags:** ignition80, perspective\
**Created:** [July 31, 2020, 6:21pm UTC](https://forum.inductiveautomation.com/t/expression-binding-error-when-binding-to-a-property-on-different-component/37269 "2020-07-31T18:21:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Matthew.gaitan](https://avatars.discourse-cdn.com/v4/letter/m/59ef9b/32.png) [@Matthew.gaitan](https://forum.inductiveautomation.com/u/Matthew.gaitan)\
**Post date:** [July 31, 2020, 6:21pm UTC](https://forum.inductiveautomation.com/t/expression-binding-error-when-binding-to-a-property-on-different-component/37269/1 "2020-07-31T18:21:47Z")

</div>

I believe I have found a bug using Perspective 8.0.13.

I am attempting to compare two values (which are being Exported from Embedded Views):  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/e/9e42dc6ebd330c0850b7c89369d30d69e7d08793.png)

The error is clearly coming from the …/30D\_Avg value as noted by a regular property binding to it:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/b/3b3a201c6e8488e37e2535fc97846590ce9187c0.png)

I’m not sure if there’s a different format I can be writing the properties in. The displayed format is what the `Browse Properties` selector returns.