# Kibana, canvas, Image reveal problem after upgrade to 8.4.1 from 8.3.1

**URL:** <https://discuss.elastic.co/t/kibana-canvas-image-reveal-problem-after-upgrade-to-8-4-1-from-8-3-1/313986>\
**Category:** Kibana\
**Created:** [September 8, 2022, 11:15am UTC](https://discuss.elastic.co/t/kibana-canvas-image-reveal-problem-after-upgrade-to-8-4-1-from-8-3-1/313986 "2022-09-08T11:15:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ibrahim\_Z\_HIDIR](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ibrahim_z_hidir/32/106875_2.png) [@Ibrahim\_Z\_HIDIR](https://discuss.elastic.co/u/Ibrahim_Z_HIDIR)\
**Post date:** [September 8, 2022, 11:15am UTC](https://discuss.elastic.co/t/kibana-canvas-image-reveal-problem-after-upgrade-to-8-4-1-from-8-3-1/313986/1 "2022-09-08T11:15:30Z")

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Hi

I've just upgraded elastic clsuter from 8.3.1 to 8.4.1 and also kibana. After upgrade kibana all the Image reveal images turned exclamation mark, and when I've click on an image I'am getting error "Expression failed with the message, [math] \> Empty datatable"

I'am using Elasticsearch SQL for data and all the sql's starting like;

select case when count(host.name) \> 0 then 1 else 0 end as status from .......

for Display option I'am using value -\> Unique -\> status.

Everything was fine before upgrade.

thanks  
ibrahim

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 6, 2022, 11:16am UTC](https://discuss.elastic.co/t/kibana-canvas-image-reveal-problem-after-upgrade-to-8-4-1-from-8-3-1/313986/2 "2022-10-06T11:16:25Z")

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