MSSQL on Windows: XML: Failed to instantiate class. Make sure Msxml2.dll exists in the SQL Server installation

Microsoft.SQLServer.Windows.EventRule.DBEngine.XML___Failed_to_instantiate_class._Make_sure_Msxml2.dll_exists_in_the_SQL_Server_installation_1_5_Rule (Rule)

The Msxml2.dll file is missing from the computer where SQL Server is installed, or it could not be loaded from the system directory while processing an XML feature such as sp_xml_preparedocument. If the file exists, it may not be registered properly, or one of its dependencies may not exist.

Knowledge Base article:

Summary

The Msxml2.dll file is missing from the computer where SQL Server is installed, or it could not be loaded from the system directory while processing an XML feature such as sp_xml_preparedocument . If the file exists, it may not be registered properly, or one of its dependencies may not exist.

If you installed MSDE SP3a on a computer that does not have an earlier version of MSDE installed, the Msxml2.dll file may not have been installed. If you have another edition of SQL Server, the file may have been removed by a program uninstall, or it may have been manually deleted or unregistered.

Resolutions

Search the SQL Server machine for Msxml2.dll. If the file exists, verify that it is registered properly.

Overridable Parameters

Name	Description	Default Value
Enabled	Enables or disables the workflow.	Yes
Interval (seconds)	The recurring interval of time in seconds in which to run the workflow.	300
Priority	Defines Alert Priority.	1
Severity	Defines Alert Severity.	2
Synchronization Time	The synchronization time specified by using a 24-hour format. May be omitted.
Timeout (seconds)	Specifies the time the workflow is allowed to run before being closed and marked as failed.	200
Timeout for query execution (seconds)	The workflow will fail and register an event, if the query execution takes longer than the specified period.	60
Timeout for database connection (seconds)	The workflow will fail and register an event, if it cannot access the database during the specified period.	15

Element properties:

Target

Microsoft.SQLServer.Windows.DBEngine

Category

EventCollection

Enabled

True

Alert Generate

True

Alert Severity

Error

Alert Priority

Normal

Remotable

True

Alert Message

MSSQL on Windows: XML: Failed to instantiate class. Make sure Msxml2.dll exists in the SQL Server installation

{2}

Comment

Mom2017ID='{4C0A552D-FD2B-4E11-AE2F-4C02A27CDFE5}';MOM2017GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}

Member Modules:

ID	Module Type	TypeId	RunAs
_F6DA1507_12AF_11D3_AB21_00A0C98620CE_	DataSource	Microsoft.SQLServer.Windows.DataSource.EventCollectionFiltered	Default
GenerateAlert	WriteAction	System.Health.GenerateAlert	Default

Source Code:

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  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="_F6DA1507_12AF_11D3_AB21_00A0C98620CE_" Comment="{F6DA1507-12AF-11D3-AB21-00A0C98620CE}" TypeID="Microsoft.SQLServer.Windows.DataSource.EventCollectionFiltered">

      <MachineName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</MachineName>

      <NetbiosComputerName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/NetbiosComputerName$</NetbiosComputerName>

      <InstanceName>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/InstanceName$</InstanceName>

      <ConnectionString>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/ConnectionString$</ConnectionString>

      <InstanceVersion>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/Version$</InstanceVersion>

      <InstanceEdition>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/Edition$</InstanceEdition>

      <MonitoringType>$Target/Property[Type="SqlDiscW!Microsoft.SQLServer.Windows.DBEngine"]/MonitoringType$</MonitoringType>

      <SqlExecTimeoutSeconds>60</SqlExecTimeoutSeconds>

      <SqlTimeoutSeconds>15</SqlTimeoutSeconds>

      <TimeoutSeconds>200</TimeoutSeconds>

      <IntervalSeconds>300</IntervalSeconds>

      <SyncTime/>

      <EventDisplayNumber>6608</EventDisplayNumber>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="Health!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>2</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.SQLServer.Windows.EventRule.DBEngine.XML___Failed_to_instantiate_class._Make_sure_Msxml2.dll_exists_in_the_SQL_Server_installation_1_5_Rule.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>$Target/Property[Type="SqlCoreLib!Microsoft.SQLServer.Core.DBEngine"]/MachineName$</AlertParameter1>

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        <AlertParameter3>Event ID: $Data/Property[@Name='EventID']$. $Data/Property[@Name='Message']$</AlertParameter3>

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>