How to Fix QuickBooks Error 6129 0 (Step-by-Step)

QuickBooks Error 6129 0 is an authentication failure in the software. It pops up when database connection verification fails or when the user tries to access the company file, which is being used on another workstation in the network. If you're also encountering this error, we are here to fix any QuickBooks-related issue. With the help of the following precise methods, you can easily overcome this Error 6129 in QuickBooks Desktop. You only need to read this post till the end to get step-by-step guidance.

Important: Facing any issue while going through these methods? Let our experts help you. Call us at +1(800) 314-0226 to get in touch with our team within a few seconds and get your problem solved shortly.

What may lead to QuickBooks Pro Error 6129 0

There are various reasons that may trigger QuickBooks Pro Error 6129 0. You can find below all the possible causes behind this error.

1. All workstations in the network are not using the latest released version of QuickBooks.
2. The Client and Server are not pointing to the same domain.
3. QuickBooks Installation files may be virus-infected or corrupted.
4. The file with the '.ND' extension might be damaged.
5. Inappropriate folder permission or QBDBSM might not be working.

How to step-by-step Resolve QuickBooks Error 6129 0

To deal with QuickBooks Error 6129 0, you can utilize different techniques. But it's important to fix the root cause for fixing this error permanently. We recommend you use the solutions one by one, which are described below in this post.

Solution 1. Fix the formatting issue with the '.QBW' file:

Formatting issue with QBW file is one of the major reasons for this frustrating error code. Firstly, you should fix it by renaming the file.

1. Open the folder where the QB company files are stored.
2. Find out the file containing the '.ND' extension. (E.g., Companyfilename.qbw.nd).
3. Right-click on the '.ND' file.
4. Opt for 'Rename'.
5. Include '.OLD' at the end of the file. (Example- company file name .qbw.nd.OLD).
6. If you employ the multi-user mode to work on the company file on multiple computers, set-up the QB Database Server Manager. But, if your work with only one computer, you can open the company file.

Solution 2: Copy and Open Company File from another location
If there is any issue with the company file location, you can adopt this solution. To perform this method you can consider the below instructions carefully.

1. Once you have created a new folder, go to the company file folder.
2. Then, copy the (.QBW) file.
3. Now, you have to create a new folder where you can access it easily.
4. Paste the '.QBW' file in this newly added folder.
5. If the QuickBooks is working on multi-user mode, then set-up folder permissions.
6. After that, create a new folder in QBDBSM and paste the file into it.
7. Do what performing you faced QuickBooks Error 6129 0.

Solution 3: Turn off antivirus or other security apps in safe mode
Your existing antivirus or software program may block QB from reaching out the internet server. You can fix it by going through the below steps.

1. Power up your system in Safe mode.
2. Deactivate your currently running antivirus software on your PC.
3. Create/Add the new company file.
4. Back to Windows normal mode by rebooting your system.
5. Lastly, open QuickBooks and the company file.

Solution 4: Check that all the network computers are working on the same domain
To check the domain is the same on the multiple computers in the network, you will need to contact a local technical person. Also, you can consider our online support to fix Error 6129 0 in QuickBooks from the root.

In this way, you can easily eliminate QuickBooks Error Code 6129 0. But, some different reasons can also be there that cannot be fixed manually. If the error is still displaying, you should contact technical advisors. They can settle this error permanently. You just need to call us at +1(800) 314-0226. Our team is 24/7 available and responds immediately.

Also Read : QuickBooks Error 15311