Fix QuickBooks Error QBDBMgrN Not Running

The “QBDBMgrN not running on this computer” error appears when the QuickBooks Database Server Manager service stops working. This issue prevents multi-user access, stopping QuickBooks from connecting to the company file stored on a network.

This article explains what causes the error, how to identify it, and the complete steps to fix it.

What is QuickBooks Error QBDBMgrN Not Running?

QuickBooks Database Server Manager (QBDBMgrN) enables multi-user mode in QuickBooks Desktop. The error “QBDBMgrN not running” indicates that the service has stopped or is blocked by Windows Firewall. It prevents network workstations from connecting to the company file hosted on the server.

Why does QuickBooks Error QBDBMgrN Not Running occur?

The error occurs due to configuration or network issues such as:

• The Database Server Manager service (QBDBMgrN) is stopped.
• Windows Firewall blocks QuickBooks ports.
• The Database Server Manager is outdated.
• Damaged network data (.ND) file.
• Incorrect installation of QuickBooks Database Server Manager.

How can you identify QuickBooks Error QBDBMgrN Not Running?

You can confirm the error if you notice these signs:

• The error message “QBDBMgrN not running on this computer” appears.
• Multi-user mode does not activate.
• QuickBooks cannot connect to the company file on the server.
• QuickBooks Database Server Manager is inactive in the Services window.

What are the steps to fix QuickBooks Error QBDBMgrN Not Running?

You can resolve the issue by restarting the service, adjusting firewall settings, or reinstalling the Database Server Manager.

Solution 1: Restart QuickBooks Database Server Manager Service

Follow these steps to restart the service:

1. Press Windows + R, type services.msc, and press Enter.
2. Locate QuickBooksDBXX (XX depends on your QuickBooks version).
3. Right-click it and select Restart.
4. Ensure the startup type is set to Automatic.
5. Reopen QuickBooks and switch to multi-user mode.

Solution 2: Configure Windows Firewall and Port Settings

Firewall settings often block the Database Server Manager. Adjust them as follows:

1. Open Control Panel > System and Security > Windows Defender Firewall.
2. Click Advanced Settings > Inbound Rules.
3. Create a New Rule for QuickBooks.
4. Allow ports used by QuickBooks (e.g., 8019, 56728, 55378–55382).
5. Save and restart your computer.

Solution 3: Repair QuickBooks Database Server Manager

A damaged installation can stop the service.

1. Open Control Panel > Programs and Features.
2. Select QuickBooks Database Server Manager and click Repair.
3. Once the repair completes, restart your system.
4. Check if the service starts automatically.

Solution 4: Recreate the Network Data (.ND) File

The .ND file allows QuickBooks to access the company file on a network.

1. Open the folder containing your company file.
2. Locate and delete the .ND file (e.g., CompanyName.qbw.nd).
3. Open QuickBooks Database Server Manager and rescan the folder.
4. A new .ND file will be created automatically.

Solution 5: Reinstall QuickBooks Database Server Manager

If other methods fail, reinstall the tool.

1. Open Control Panel > Programs and Features.
2. Uninstall QuickBooks Database Server Manager.
3. Download the latest version from Intuit’s official site.
4. Install and update it.
5. Restart your computer and check if the service is active.

Is there an automated tool to fix QuickBooks Error “QBDBMgrN Not Running”?

Yes. Use QuickBooks Tool Hub to run the QuickBooks Database Server Manager Tool or QuickBooks File Doctor. These utilities automatically detect and fix network-related issues causing the QBDBMgrN error.

How can I prevent QuickBooks Error “QBDBMgrN Not Running” in the future?

• Keep QuickBooks Desktop and Windows updated.
• Regularly update and run the Database Server Manager.
• Ensure Windows Firewall allows QuickBooks ports.
• Maintain stable network connections.
• Use reliable antivirus software without blocking QuickBooks.

What if QuickBooks Error QBDBMgrN Not Running is not fixed after troubleshooting?

If the error continues after trying the steps above, it might indicate deep system or network corruption.

How can our experts assist you in resolving QuickBooks Error QBDBMgrN Not Running?

If you cannot fix the issue manually, contact Error Code Experts. Our certified QuickBooks specialists provide remote assistance to repair database server issues and restore connectivity.

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