The Ultimate Guide to Resolving QuickBooks Error Code 6129 0

Oct 30, 2023

Are you facing QuickBooks Error Code 6129 0 on your computer? Don't worry, you've come to the right place! On, we understand the frustration that comes with encountering error codes while using QuickBooks. In this comprehensive guide, we will provide you with detailed step-by-step instructions to help you resolve the QuickBooks Error Code 6129 0 and get back to business smoothly.

Understanding QuickBooks Error Code 6129 0

QuickBooks Error Code 6129 0 occurs when the database connection verification fails or when QuickBooks is unable to access the company file. This error can prevent you from opening or creating a new company file, causing unnecessary delays in your daily operations.

It is important to address this error as soon as possible to avoid any data loss or further complications. Follow the instructions below to resolve QuickBooks Error Code 6129 0:

Steps to Resolve QuickBooks Error Code 6129 0

Step 1: Update QuickBooks

The first step in resolving any QuickBooks error is to ensure that you are using the latest version of the software. Intuit, the company behind QuickBooks, regularly releases updates that include bug fixes and improvements. To update QuickBooks:

  1. Open QuickBooks and navigate to the Help menu.
  2. Select "Update QuickBooks."
  3. Click on "Update Now" and wait for the process to complete.
  4. Restart your computer after the update is finished.

Step 2: Rename the .ND and .TLG files

The .ND and .TLG files are configuration files that might get corrupted due to various reasons, leading to QuickBooks Error Code 6129 0. Renaming these files will prompt QuickBooks to create new ones. Follow these steps to rename the files:

  1. Close QuickBooks and navigate to the folder containing your company file.
  2. Locate the files with the same name as your company file but with the extensions .ND and .TLG (e.g., CompanyFile.QBW.ND).
  3. Right-click on each of these files and select "Rename."
  4. Add ".OLD" at the end of each file name (e.g., CompanyFile.QBW.ND.OLD).

Step 3: Restart QuickBooks Database Server Manager

QuickBooks Database Server Manager is a utility that allows multiple users to access a company file stored on a server. Restarting this service can help resolve connectivity issues related to QuickBooks Error Code 6129 0. To restart QuickBooks Database Server Manager:

  1. Press Windows + R on your keyboard to open the Run dialog box.
  2. Type "services.msc" and press Enter.
  3. Scroll down and locate "QuickBooksDBXX" (XX refers to the version of QuickBooks you are using, e.g., QuickBooksDB28 for QuickBooks Desktop 2018).
  4. Right-click on the service and select "Restart."

Step 4: Disable Antivirus and Firewall temporarily

Sometimes, certain antivirus or firewall settings can interfere with the proper functioning of QuickBooks, triggering error codes like 6129 0. Temporarily disabling your antivirus and firewall software can help determine if they are causing the issue. Keep in mind that this step should only be performed if you are confident in your computer's security. To disable antivirus and firewall:

  1. Open the antivirus software installed on your computer.
  2. Look for options related to real-time scanning or protection.
  3. Temporarily disable the real-time scanning or protection feature.
  4. Similarly, disable any firewall software running on your computer.

Step 5: Change the location of the company file

If the above steps did not resolve QuickBooks Error Code 6129 0, try changing the location of the company file. Moving the file to a different folder or location can help overcome file corruption issues. Follow these steps:

  1. Create a new folder on your computer's local drive (e.g., C:\QBTest).
  2. Locate the company file and copy it to the newly created folder.
  3. Open QuickBooks and navigate to the newly copied file.

Step 6: Create a new company file

If all else fails, creating a new company file can be a last resort to resolve QuickBooks Error Code 6129 0. Before proceeding with this step, make sure you have a backup of your company file. To create a new company file:

  1. Open QuickBooks and click on "Create a new company" or "Start Interview."
  2. Follow the on-screen prompts to set up a new company file.
  3. Once the new company file is created, import your data from the backup to restore your financial information.


QuickBooks Error Code 6129 0 can be a frustrating obstacle in your daily business operations, but with this comprehensive guide provided by, you now have the knowledge to resolve it quickly and efficiently. Remember, it's crucial to follow the steps in order and backup your company file before making any changes. By implementing these solutions, you can overcome QuickBooks Error Code 6129 0 and get back to managing your business effectively.

We hope this article has been helpful to you. For more informative content and troubleshooting guides, visit our website regularly, where we provide valuable resources for all your business needs.

error code 6129 0 quickbooks
John Hinshaw
Amazing solution!
Nov 5, 2023
Luz Gomez
Thanks for the helpful guide, really saved my day!
Nov 1, 2023