Error 6129, 0 is a 6000 series error that can disrupt a user's work. The error can occur suddenly and requires immediate attention to continue using QuickBooks. The error message "Error code: -6129, 0: Database connection verification failure" is displayed on the user's screen. The article offers causes and solutions to eliminate this error and resume normal functioning.

What Does QuickBooks Error Code 6129 Means?

The QuickBooks error 6129, 0 can occur at any time while working on company data and prevent access to the company file in both single-user and multi-user modes. The error message displayed when encountering this error indicates that the connection with the database cannot be verified by QuickBooks. There are multiple reasons why this error occurs, which we have listed in detail in this article.

What are the Causes behind to QuickBooks Error 6129?

There might be various of possible reasons that can causes QuickBooks error code 6129. Few are as”:

• The error may occur if a third-party antivirus or anti-malware application interferes with QuickBooks background processes.
• QuickBooks requires a Network Data file to connect to the company file. If the .nd file is damaged.
• Upgrading the company file using a non-administrative account on Windows can trigger the error.
• Accessing a company file located on a different domain in the network can result in sucherror.
• If the computer is in multi-user mode and is not using the latest QuickBooks version, this error may occur.
• Incorrect folder permissions or insufficient permissions for QuickBooks Database Server Manager can also lead to such error.
• Invalid entries in the Windows Registry.

Latest Methods to Resolve QuickBooks Error Code 6129,0

Check the DIY steps to rectify the error code 6129 in QuickBooks desktop:

Method 1: Rename Network Data File

• Open Windows File Manager and go to the QuickBooks installation folder.
• Right-click on the file that has the .ND extension.
• Choose the Rename option and add .OLD at the end of the file name.

• Attempt to open the company file again.

Method 2: Moving the Company File to a Different Location on Windows

• Copy the company file from the QuickBooks installation folder.
• Create a new folder on the desktop.
• Paste the company file into the newly created folder.
• Open QuickBooks Desktop and open the company file from the new folder.
• If the problem is solved, it indicates that the folder containing the company file is damaged, and it needs to be repaired for a permanent fix.
• If QuickBooks error 6129, 0 occurs again, move on to the next troubleshooting step.

Method 3: Reboot Windows in Safe Mode

• Restart your computer and continuously press the F8 key on your keyboard when the system displays the boot screen.
• If the Advanced Boot Options window doesn't appear, restart your computer again and hold down the F8 key.
• Once the Advanced Boot Options window appears, select Safe Mode with Networking by pressing the down-arrow key, and then hit Enter.

• Log in using the admin account and attempt to open the company file.

Method 4: Turn off the antivirus using safe mode

• First, start the system in safe mode.
• Once you reach the desktop screen, disable the antivirus software.
• Create a new company file while the system is in normal operating mode.
• Reboot the system and open QuickBooks along with the company file.

Summing Up!

If you're still facing the QuickBooks error code 6129 or any similar issue even after trying to access the company file in safe mode, then it's possible that another security application like antivirus or anti-malware might be causing the error. In such cases, you can try uninstalling those applications or reach out to QuickBooks error support team to exclude QB from their scan list. You can also seek the assistance of a certified professional by dialing 1-800-615-2347.

See Also: How to Resolve QuickBooks Error Code 6144 82