Who is this article for?

Users who encounter the error.

IT Administrator permissions are required to resolve the issue.

When saving a record that causes a change to the Entity/Org Unit hierarchy, you might see the error "Access to Message Queuing system is denied.".

This article explains what causes the issue and how to resolve it.

1. Issue

When you make a change to an Entity or Org Unit record, the server service writes a message to the message queue.

If the PentanaService app pool Windows user does not have permission to write to the queue, this error will be displayed.



In addition, PentanaTngService.log will show this error:

*****An exception occurred at 08 May 2025 14:47:42 using version 6.0.1.8
1. Exception of type: MessageQueueException - Message: Access to Message Queuing system is denied.

2. Solution

To resolve the issue, grant Full Control to the Windows account used by the PentanaService app pool:

1. Open IIS Manager.
2. Look at Application Pools.
3. Find the app pool used by Pentana.
4. Check the Identity - this is the Windows user we need to grant permission for.
5. Open Computer Management.
6. Open Message Queuing.
7. Select Private Queues.
8. For the correct queue, go to Properties.
9. Choose Security.
10. Add the Windows user used by the Pentana App Pool.
11. Grant Full Control.
12. Ensure that the Pentana Robot user is listed, and has Full Control.
    • If not, go to Services and find the Robot service.
    • Find the Log On As user, and grant that user Full Control of the message queue.