---
title: "HostUpgradeFailedEvent"
description: "This event records a failure to connect to a host due to an installation or upgrade issue. Cannot install or upgrade vCenter agent service on the host. Check status of host, check if any recent updates or patches have been successfully applied."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/hostupgradefailedevent.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Host Error > HostUpgradeFailedEvent"
dateModified: "2026-09-10"
---

# HostUpgradeFailedEvent

## Summary

This event records a failure to connect to a host due to an installation or upgrade issue.

## Causes

Cannot install or upgrade vCenter agent service on the host.

## Resolutions

Check status of host, check if any recent updates or patches have been successfully applied. See this [VMware KB Article](https://knowledge.broadcom.com/external/article/378906/troubleshooting-nsx-host-upgrade-failure.html) for more information and troubleshooting steps.

## External

Refer to the [VMware Online Documentation](https://techdocs.broadcom.com/) for more information.