# Error monitoring Host : Error executing poll \[FIXED\]

**URL:** <https://forum.opennebula.io/t/error-monitoring-host-error-executing-poll-fixed/747>\
**Category:** Product Support\
**Created:** [May 19, 2015, 12:56pm UTC](https://forum.opennebula.io/t/error-monitoring-host-error-executing-poll-fixed/747 "2015-05-19T12:56:01Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dmolina](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/dmolina/32/22_2.png) [@dmolina](https://forum.opennebula.io/u/dmolina)\
**Post date:** [May 27, 2015, 9:04am UTC](https://forum.opennebula.io/t/error-monitoring-host-error-executing-poll-fixed/747/2 "2015-05-27T09:04:28Z")

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It should be solved as explained in the following thread:

> [@Add EC2 host in sandbox](https://forum.opennebula.io/t/add-ec2-host-in-sandbox/716/8):
>
> Hi, yes, now connect to aws:. # gem install aws-sdk-v1 # gem uninstall aws-sdk Select gem to uninstall: aws-sdk-1.33.0 aws-sdk-1.50.0 aws-sdk-1.57.0 aws-sdk-2.0.29 All versions 4

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