# Grafana 7.3.0 data source CloudWatch Custom namespace error

**URL:** <https://community.grafana.com/t/grafana-7-3-0-data-source-cloudwatch-custom-namespace-error/37646>\
**Category:** Configuration\
**Created:** [October 7, 2020, 7:36pm UTC](https://community.grafana.com/t/grafana-7-3-0-data-source-cloudwatch-custom-namespace-error/37646 "2020-10-07T19:36:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sonjaya](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@sonjaya](https://community.grafana.com/u/sonjaya)\
**Post date:** [October 7, 2020, 7:36pm UTC](https://community.grafana.com/t/grafana-7-3-0-data-source-cloudwatch-custom-namespace-error/37646/1 "2020-10-07T19:36:20Z")

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Hi …  
I upgrade from grafana 6.x to 7.x and find the data source Cloudwatch namespace not working .  
here log from grafana :  
error=“unable to call AWS API: InvalidParameter: 1 validation error(s) found.\n- minimum field size of 1, ListMetricsInput.Namespace.\n” remote\_addr=  
for another namespace AWS/XXX was working fine .

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<div class="post-metadata">

**Author:** ![sonjaya](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@sonjaya](https://community.grafana.com/u/sonjaya)\
**Post date:** [October 22, 2020, 9:14am UTC](https://community.grafana.com/t/grafana-7-3-0-data-source-cloudwatch-custom-namespace-error/37646/2 "2020-10-22T09:14:24Z")

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any have expirence like this ?

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**Author:** ![jacopobernasconi](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/jacopobernasconi/32/13454_2.png) [@jacopobernasconi](https://community.grafana.com/u/jacopobernasconi)\
**Post date:** [October 27, 2020, 10:17am UTC](https://community.grafana.com/t/grafana-7-3-0-data-source-cloudwatch-custom-namespace-error/37646/3 "2020-10-27T10:17:50Z")

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Same for me when try to listing “Metric Name” with custom metric selected.  
Grafana 7.2.0