You can troubleshoot upgrade problems by reviewing the error logs. If VMware Identity Manager does not start, you can revert to a previous instance by rolling back to a snapshot. Checking the Upgrade Error LogsResolve errors that occur during upgrade by reviewing the error logs. Upgrade log files are in the /opt/vmware/var/log directory. Rolling Back to Snapshots of VMware Identity ManagerIf VMware Identity Manager does not start properly after an upgrade, you can roll back to a previous instance. Collecting a Log File BundleYou can collect a bundle of log files. You obtain the bundle from the VMware Identity Manager appliance configuration page.