If you encounter problems when running or using Update Manager, you can use a troubleshooting topic to understand and solve the problem, if there is a workaround. Update Manager Web Client Remains Visible in the vSphere Web Client After Uninstalling Update Manager ServerAfter you uninstall Update Manager server, the Update Manager tab might remain visible under the Monitor tab in the vSphere Web Client. Connection Loss with Update Manager Server or vCenter Server in a Single vCenter Server SystemBecause of loss of network connectivity or the restart of the servers, the connection between the Update Manager plug-in and the Update Manager server or vCenter Server system might get interrupted. Connection Loss with Update Manager Server or vCenter Server in a Connected Group in vCenter Linked ModeBecause of loss of network connectivity or a server restart, the connection between the Update Manager plug-in and the Update Manager server or vCenter Server system might get interrupted. Gather Update Manager Log BundlesYou can gather information about recent events on the Update Manager server for diagnostic purposes. When Update Manager and vCenter Server are installed on the same machine, you can also gather the vCenter Server log bundle together with the Update Manager log bundle. Gather Update Manager and vCenter Server Log BundlesWhen the Update Manager server and vCenter Server are installed on the same computer, you can gather information about recent events on the Update Manager server and vCenter Server system for diagnostic purposes. Log Bundle Is Not GeneratedBecause of limitations in the ZIP utility used by Update Manager, the cumulative log bundle size cannot exceed 2GB, although the script seems to complete successfully. Host Extension Remediation or Staging Fails Due to Missing PrerequisitesSome host extension remediation or staging operations fail because Update Manager does not automatically download and install missing prerequisites. No Baseline Updates AvailableBaselines are based on metadata that Update Manager downloads from the VMware and third-party Web sites. All Updates in Compliance Reports Are Displayed as Not ApplicableScan results usually consist of a mix of installed, missing, and not applicable results. Not applicable entries are only a concern when this is the universal result or when you know that the patches should be applicable. All Updates in Compliance Reports Are UnknownScanning is the process in which you generate compliance information about vSphere objects against attached baselines and baseline groups. The compliance statuses of objects can be All Applicable, Non Compliant, Incompatible, Unknown, and Compliant. VMware Tools Upgrade Fails if VMware Tools Is Not InstalledUpdate Manager upgrades only an existing installation of VMware Tools in a virtual machine running on a host of version ESX/ESXi 4.0 or later. ESX/ESXi Host Scanning FailsScanning is the process in which you generate compliance information about the vSphere objects against attached baselines and baseline groups. In some cases, the scan of ESX 4.0.x and ESXi 4.0.x hosts might fail. ESXi Host Upgrade FailsThe remediation process of an ESXi host against an upgrade baseline or a baseline group containing an upgrade baseline might fail. The Update Manager Repository Cannot Be DeletedWhen you uninstall the Update Manager server, you might want to delete the Update Manager repository. Incompatible Compliance StateAfter you perform a scan, the compliance state of the attached baseline might be incompatible. The incompatible compliance state requires more attention and further action to be resolved.