# Insert historical tag into Box and Whisker chart

**URL:** <https://forum.inductiveautomation.com/t/insert-historical-tag-into-box-and-whisker-chart/33436>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [March 26, 2020, 2:02pm UTC](https://forum.inductiveautomation.com/t/insert-historical-tag-into-box-and-whisker-chart/33436 "2020-03-26T14:02:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mitchel.Gommers](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@Mitchel.Gommers](https://forum.inductiveautomation.com/u/Mitchel.Gommers)\
**Post date:** [March 26, 2020, 2:02pm UTC](https://forum.inductiveautomation.com/t/insert-historical-tag-into-box-and-whisker-chart/33436/1 "2020-03-26T14:02:02Z")

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I get an error when i insert a historical tag to the Box and Whisker chart. The error is:  
`t_stamp` ’ is not numeric.

I dragged the tag from the available historical tags to the selected historical tags.  
Is this the right way to inset a historical tag into a Box and Whisker chart?

Thanks.  
Mitchel