Backup to tape failed with Library Not Available

Microsoft.SystemCenter.DataProtectionManager.2011.Discovery.BackupToTapeFailed_LibraryNotAvailable (UnitMonitor)

Backup to tape failed with Library Not Available.

Element properties:

TargetMicrosoft.SystemCenter.DataProtectionManager.2011.Library.DPMLibrary
Parent MonitorSystem.Health.ConfigurationState
CategoryCustom
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.SystemCenter.DataProtectionManager.2011.Discovery.BackupToTapeFailed_with_LibraryNotAvailable
RemotableTrue
AccessibilityPublic
Alert Message
DPM: Backup to tape failed - Library not available
Backup to tape failed with Library Not Available for some of the data sources associated with the library: {0}

Resolution steps:
{1}

Recommended action:
{2}
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.SystemCenter.DataProtectionManager.2011.Discovery.BackupToTapeFailed_LibraryNotAvailable" Accessibility="Public" Enabled="true" Target="SCDPM!Microsoft.SystemCenter.DataProtectionManager.2011.Library.DPMLibrary" ParentMonitorID="Health!System.Health.ConfigurationState" Remotable="true" Priority="Normal" TypeID="Microsoft.SystemCenter.DataProtectionManager.2011.Discovery.BackupToTapeFailed_with_LibraryNotAvailable" ConfirmDelivery="true">
<Category>Custom</Category>
<AlertSettings AlertMessage="Microsoft.SystemCenter.DataProtectionManager.2011.Discovery.BackupToTapeFailed_LibraryNotAvailable_AlertMessageResourceID">
<AlertOnState>Error</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>Normal</AlertPriority>
<AlertSeverity>Error</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Target/Property[Type="System!System.Entity"]/DisplayName$</AlertParameter1>
<AlertParameter2>$Data/Context/Params/Param[29]$</AlertParameter2>
<AlertParameter3>$Data/Context/Params/Param[30]$</AlertParameter3>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="UIGeneratedOpStateIde1dcb6540c154aa69ae666c467c2c5a4" MonitorTypeStateID="UnHealthy" HealthState="Error"/>
<OperationalState ID="UIGeneratedOpStateIda8d2f5991b154d0aa610a0caaa82b804" MonitorTypeStateID="Healthy" HealthState="Success"/>
</OperationalStates>
<Configuration/>
</UnitMonitor>