How to Fix QuickBooks 6129 0 Error or Database Connection Failure Error

When you access your QuickBooks company files or the verification of the database connection fails to establish, QuickBooks 6129 error is likely to pop up on your screen. As a result, you fail to open your company files in QuickBooks. In addition, the network that is used by your QuickBooks will not be able to find the server or your device that stores the file.

If you have stumbled upon QuickBooks error 6129 0, immediate action should be taken as this can affect your operations. Through this guide, we want to help you to understand the leading factors and discover the helpful methods to rectify unexpected errors in QuickBooks.

Leading Causes of QuickBooks Error 6129 0

In QuickBooks, users can confront the 6129 0 error code due to several reasons. Some of the certain reasons are specified below:

All the devices are used in multi-user mode.
Users are not using the latest version of QuickBooks.
QuickBooks 6129 can arise when the server domain and client are mismatched.
QuickBooks company files are updated to the latest version with a non-Windows Administrator profile that can create conflicts when accessing it.
ND files may be damaged.
Antivirus programs can create problems between programs.
Invalid entries in Windows registry.
The computer was not shut down properly.

Apart from this, there can be other reasons behind error 6129 0 in QuickBooks. Probably your network connection from the host server was interrupted. Similarly, there can be other probable key reasons. However, you can resolve it regardless of the severeness of the error.

What To Do Before Solving QuickBooks Error Code 6129 0

Before proceeding further, one should understand the basic troubleshooting ways to solve QuickBooks 6129. This error appears depending on two different cases; one when you create a new company file and when you update or open the company file in QuickBooks.

Case 1: When You Are Create a New File

The first case which could be the reason for QuickBooks error 6129 0 is when you create a new company file. In this case, you are required to perform the following steps:

Click on the “Leave” or “Exit” option on the window.
Then save the file.
Click the “Yes” button.
Add a different name to your file.
Select the “Save” option.

If you fail to change the file name then you should try changing the file location. This may help you to avoid errors.

Case 2: When You Update or Open the Company File

In this case, you should first launch a sample file so that you can identify if the problem is linked with your file or not. If the error occurred to all your company files then you can follow the troubleshooting methods that we will in this guide. This should be noted that Windows computers should be logged in with admin rights before performing any method.

How to Fix Error Code 6129 0 in QuickBooks?

QuickBooks 6129 error can be fixed by performing basic troubleshooting methods. First of all, you will have to make sure that your QuickBooks is updated to the latest version. Thereafter, you can run the QuickBooks File Doctor tool, rename the Network Descriptor file, change company file location, and scan QuickBooks folders to avoid errors.

Furthermore, you can restart your Windows computer in Safe Mode, disable antivirus services, login Windows as an administrator, change QuickBooks folder permission, switch to single-user mode, reinstall QuickBooks, or run the Quick Fix My Program tool if required.

1: Update QuickBooks to the Latest Version

By updating QuickBooks to the latest version, you may end up with several bugs and issues with your company files. To download and install the QuickBooks update, you can pursue these steps:

Close the QuickBooks program if opened any.
Hold down the “Ctrl” key on your keyboard until you see QuickBooks opened on your device.
Then, go to the “Help” button.
Select the “Update QuickBooks” option.
Now, hit the “Update Now” button.
Select the “Get Updates” option.
Click on the “OK” button if prompted.
Close “QuickBooks Desktop” and relaunch it.
Click “Yes” if prompted to install new updates.

As you perform these steps, the update will start installing on your computer. Once the process is finished completely, you can continue accessing your company files.

2: Rename ND Files

Corrupted network descriptor files (.ND) files can create conflicts on your Windows computer due to which you face errors in QuickBooks. By changing the ND file name of QuickBooks support files, you can get rid of error 6129 0 in QuickBooks.

Follow these steps to rename the network data file on a Windows computer. Make sure you close all QuickBooks windows if opened.

Launch the QuickBooks company file on the server.
Then, open the file related to your QuickBooks program but the file extension should be an “ND” file.
Then, click right on the “ND” file.
Choose the “Rename” option.
Type “Old” at the end of the file name.

By doing so, your network files will automatically be created when you access the company files. After changing the name of the network files, you can check if the QuickBooks 6129 error persists.

3: Run QuickBooks File Doctor

QuickBooks company files may get corrupted due to which you are not able to access or update the file. In such situations, you can repair the company file with the help of the QuickBooks File Doctor Tool.

Tip: You can download QuickBooks File Doctor Tool separately. But if you have QuickBooks Tool Hub installed on your PC then you can use that too.

Open “QuickBooks Tools Hub”.
Click on the “Company File Issues” section located on the left
Select the “Run QuickBooks File Doctor” button.
Hit the “Browse” button.
Now, pick your company file to repair.
Ensure that the “Check your file” button is marked.
Then, click on the “Continue” button.
After that, sign in to the company file with admin rights.
Click the “Continue” button.

This way you can repair your company files. Once done performing these steps, you can try accessing the company file. If you still are facing issues with it then switch to the next fixation method.

4: Move Company File to Another Folder

To determine if the problem is with your file path, you should try creating a new folder and move your company files to that folder so that you can check if you can access the file from another folder.

Once you are done moving your company files to another folder, you can scan the folder using the QuickBooks database server manager. Follow these steps to know more.

Create a New Folder to Move Data

Locate the folder where your company file is saved.
Then, click right on the QuickBooks company file.
Choose the “Copy” option. Make sure you copy the file with the QBW file extension.
Then, on your desktop screen, click right and select the “New Folder” option.
At this point, paste the file you copied earlier to the new folder you just created.

After you change the file location, open or update the company file from this new location. This will help you to access your company files easily.

Scan the Folders

Click on the “Start” option.
Go to the “Programs” option.
Click on the “QuickBooks”.
Launch “QuickBooks Database Server Manager”.
Click on the “Scan folders” option in order to scan.
In case you don’t find any folder, click on the “Add folder” option.
Then, click on the “Scan” button.
Click the “Close” button.

Once you are done scanning folders, you can open the QuickBooks company file and check if you can access it properly.

5: Restart Windows in Safe Mode

By restarting your Windows computer in Safe Mode, you can repair several issues that are affecting your computer. Hence, in this method, we will show you how to enter Safe Mode on Windows in the following steps:

Hold down the “Shift” key when the Windows 10 PC login screen is open.
Then, click on the “Restart” option in the “Shutdown” options.
On the startup screen, you will see “Advanced Boot Options”.
Click on the “Troubleshoot” option.
Select the “Advanced Options”. This will show you a few advanced options.
Click on the “Startup Settings”.
Hit the “Restart” option.
Once your PC restarts, you will find an active boot options list. Here, you can use the F4 key in order to enable Safe Mode.

After you enter Safe Mode, your system will prevent the third-party application from performing and prevent your QuickBooks software from errors. Then, you can open your QuickBooks company files uninterruptedly.

6: Switch to Single User Mode

QuickBooks error 6129 0 may appear when you configure the multi-user mode. To prevent this error, you can switch to the single-user mode. To do so, you can navigate through the menu and turn on the single-user mode in QuickBooks. This can be done using these instructions.

Open the company file.
Go to the “File” menu.
Click on the “Switch Company File to Single User Mode” option.
Now, click on the “File” menu again.
Hit the “Utilities” option.
Click on the “Stop Hosting Multi-User Access.
Now, active it again by clicking on the “File” menu.
Select the “Utilities” option.
Go to the “Host Multi-User Access”.
Click the “Yes” button if prompted.

After implementing these steps, you can enable the multi-user mode again. This will help you to remove the error 6129 0 in QuickBooks.

7: Disable Antivirus using Safe Mode

Although antivirus programs work effectively in order to protect your system from malicious activities, they may block certain programs to work properly. If you think that the antivirus program has blocked QuickBooks then you should try disabling it.

In this method, we will show you to disable antivirus using safe mode on Windows computers. Check out these steps:

Hold down the “Shift” key when the Windows 10 PC login screen is open.
Then, click on the “Restart” option in the “Shutdown” options.
On the startup screen, you will see “Advanced Boot Options”.
Click on the “Troubleshoot” option.
Select the “Advanced Options”. This will show you a few advanced options.
Click on the “Startup Settings”.
Hit the “Restart” option.
Once your PC restarts, you will find an active boot options list. Here, you can use the F4 key in order to enable Safe Mode.
Disable “Antivirus” services on your computer.
Now, create new company files.
Make sure the system is in normal working mode.
Then, reboot your computer.

Once your system is restarted, you can open your company files and check if you encounter any error code 6129 0 in QuickBooks.

8: Ensure Your Systems Work in One Domain

It is important to make sure that all the systems connected to your computer network work on one domain. To identify this, you can open the System Properties and check the Computer Name/ Domain Changes. At this point, you will have to ensure that systems are working in one single domain. In case you find anything out of your league, you can contact an IT Professional or Network Administrator to connect systems in one domain.

9: Run Windows with Admin Rights

When a user is not running a Windows computer with admin rights, it is likely to encounter issues when accessing the company files. Not signing in as an administrator on Windows may prevent you to access data properly.

Hence, it is important to enable an administrator account on Windows. This can be done in different ways. Here, we are showing steps to enable administrator account using Command Prompts:

Click on the “Start” button.
Type “Command Prompt” or “CMD” in the search bar.
When “Command Prompt” appears in the result, click right on it and select the “Run as administrator”.
Add a username and password when prompted.
Type “net user administrator /active: yes”.
Hit the “Enter” key.

This is how you can log in to your Windows computer with admin rights. Thereafter, you can check if you can open the company files without any error.

10: Change Folder Permission

Sometimes the permission to your folder is limited due to which you cannot access company files. If you set the folder permission to everyone, it will be easier for you to open the company files. To do so, you can follow these steps stated below:

Pres “Windows + E” keys on your keyboard.
Now, open the “File Explorer”.
Click on the “Folder”.
Choose the “Properties” option.
Do the same for all the folders available in the list. This should be noted that “Apply to all folders” works depending on the version of QuickBooks.
In the “Security” tab, click on “Everyone”. In case everyone is not in the “User name” box or “Group” then you can add the new one and type “Everyone”.
Hit the “OK” button.
Select the “Full Control” button.
Press the “Apply” option.
Click the “OK” button.

This way you can change the folder permission and set it to everyone. By doing so, you can access the company files in QuickBooks without conflicting with QuickBooks error code 6129 0.

11: Quick Fix My Program

If you have problems with your QuickBooks program or confronting QuickBooks error 6129 0 then we suggest you run the Quick Fix My Program tool. This tool is available within QuickBooks Tools Hub so, in order to use QuickBooks Fix My Program, you need to download and run QuickBooks Tools Hub.

Once downloaded, you can use the following steps to repair company files in QuickBooks.

Launch “QuickBooks Tool Hub”.
Select the “Program Problems” component located on the left.
Click the “Quick Fix my program” button.

It may take a few minutes to finish the whole process and repair the program. To verify if you have resolved the issue, you can open QuickBooks and try accessing company files.

12: Reinstall QuickBooks

By reinstalling the accounting software, you can reset the program settings and rectify errors in a few clicks. Thus, in this fix, we will show you how to uninstall and reinstall the QuickBooks program.

Launch the “Control Panel” with the help of the Windows search bar.
Then, select the “Uninstall a program” option.
Now, click on the “Programs and Features” option.
Here, click the “Uninstall a Program” option.

Note: If you are unable to find the Programs and Features then go to the Programs and click on the Program and Feature option.

After this, select the “QuickBooks” program from the list of all programs.
Then, click on the “Uninstall/Change” button.
Click the “Remove” option.
Hit the “Next” button.

Once QuickBooks is removed from your system, you can start reinstalling it using the following steps:

Download the QuickBooks software based on the version of your operating system.
Keep the file “QuickBooks.exe.” on the preferred location.
Follow the instructions displayed on the screen.
Accept the “License Agreement” and click the “Next” button.
Now, add the “Product and License Key” you have noted down earlier.
Hit the “Next” button.

As you activate your QuickBooks account, you can easily open your QuickBooks company file. This should remove the error 6129 0 in QuickBooks.

13: Create Portable Company File

If you restore your QuickBooks company files, you can get rid of QuickBooks error 6129 0. This can be done by preparing a portable company file. To do so, you can do the following:

Open the “QuickBooks Program” on the same system where you have taken a backup of the company file.
Now, open the original company file.
Here, you can prepare a “Portable company file”.
Once you create the portable company file, launch your “QuickBooks Desktop” on another device.
Now, restore the company file using the portable copy of the QB company file.

By using the portable file to restore the company file, you can open the file without facing unwanted errors.

14: Add Firewall Ports Exceptions for QuickBooks

Users should check the firewall settings. If the QuickBooks services are blocked, you can unblock them. By configuring the firewall settings, you can resolve QuickBooks error 6129 0.

For this process, you will have to create an inbound rule and outbound rule. Here are the steps for that:

Click the “Start” button.
Search for “Windows Firewall” using the search bar to open it.
From the “Advanced Settings”, click right on the “Inbound Rules”.
Select the “New Rule”.
Now, click the “Next” button located under the “Programs”.
Then, click on “This Program Path”.
Now, find a file location for QuickBooks.
Click the “Next” button.
Click on the “Allow the Connection”.
Select the “Next” button
Make sure that all the options are marked.
Then, hit the “Next” button.
Add the name for your new rule.
Click the “Finish” button.

Following the same steps, you can create the outbound rule. Once you are done adding ports to your firewall settings, you can remove errors easily.

Conclusive Lines

This is all you can do to rectify QuickBooks 6129 error. If you are unable to open company files in QuickBooks or the verification of the database connection fails to establish then you can implement any of the specified fixation methods given in this blog. Here, we have also enlightened you about the error, its leading causes so that you can perform the troubleshooting steps accordingly. For more information, you can drop your feedback or queries in the comment box.