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Event ID 4851 — COM+ Service Availability

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Applies To: Windows Server 2008

The COM+ service supports COM+ components that are running in COM+ applications, and it enables them to function correctly. Examples include COM+ Queued Components and COM+ Transactions.

Event Details

Product: Windows Operating System
ID: 4851
Source: Microsoft-Windows-Complus
Version: 6.0
Symbolic Name: ID_QC_MSMQ_UNAVAILABLE
Message: Queued Components requires Message Queuing. Message Queuing is not installed.%1%0

Resolve

Install Message Queuing

The event message indicates that the problem might be resolved by installing support for Message Queuing (also known as MSMQ). You can use the Add Roles Wizard to add this role service to the Application Server role.

To perform this procedure, you must have membership in Administrators, or you must have been delegated the appropriate authority.

To add Message Queuing to the Application Server role:

  1. Click Start, and then click Server Manager. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  2. Under Roles Summary, click Application Server.
  3. Click Add role services.
  4. On the Select Role Services page, click Message Queuing Activation, and then click Add Required Features in the dialog box that appears.
  5. Click Next to proceed to the Confirm Installation Options page.
  6. Click Install. After the installation process starts, input by the operator is not necessary. When the installation process is finished, the status of the installation appears on the Installation Results page.

Verify

You can verify that the required components are installed and that the role services are enabled by using Server Manager.

To perform these procedures, you must have membership in Administrators, or you must have been delegated the appropriate authority.

To verify the status of installed components and role services:

  1. Click Start, and then click Server Manager.
  2. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  3. Under Roles Summary, click Application Server.
  4. Under Role Services, confirm that the status of Message Queuing Activation and Distributed Transactions is Installed.

In addition, you can verify that the COM+ operating system component is installed and working properly.

To verify that COM+ is working properly:

  1. Click Start, and then click Run.
  2. Type comexp.msc, and then click OK. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  3. In the console tree, click Services (Local).
  4. Scroll through the list of service names to find the following services: COM+ Event System (optional), COM+ System Application, DCOM Server Process Launcher, Distributed Transaction Coordinator, Message Queuing, and Remote Procedure Call (RPC).
  5. Confirm that the status of each service is Started.

COM+ Service Availability

Application Server