Technical issues in the QuickBooks accounting software have been experienced by users up in large numbers in recent times. These technical issues appear as specific error codes or warning messages. This allows easy detection and quick rectification of the problems before they can lead to irreparable data loss.

Error -6129,0 is a database connectivity error that is mostly encountered while accessing the company files in the single or multi-user mode. This snag has turned out to be extremely annoying to QuickBooks users. This error delays the accounting work and causes hindrances to the software seamless operations. This piece of writing will discuss in detail about QuickBooks Error Code 6129 – Database connectivity verification failed” and possible steps to fix this error.

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A Preview of QuickBooks Error Codes: (-6129, 0)

Users may stumble upon various type of company file issue in QuickBooks. One such error faced by few users is ‘Error Code 6129‘ when they try to open the QuickBooks company file. An error message comes along with states:-

ProblemError Description
Problem Connecting to ServerError 6129: QuickBooks has encountered an error and needs to close. We are sorry for the inconvenience.
ErrorError -6129, 0: We’re sorry, but QuickBooks can’t open your company file.
QuickBooks Error Code 6129 0

Soon after, the accounting program immediately crashes, and any unsaved data might be lost.

What are the causes behind the QuickBooks database connection failed error 6129?

Although there can be several causes behind this Company file error, some of the most potent ones are discussed below:

  • QuickBooks is not updated to the latest version
  • Corrupt network data (.ND) file and Transaction Log(File)
  • Damaged or incomplete QuickBooks installation
  • Discrepancy between the client and domain server
  • Improper shutdown due to power failure
  • The system operation may be malfunctioning
  • Improper shutdown of QuickBooks due to power failure
  • The operating system is not updated
  • Invalid keys in the Windows registry

Associated Symptoms related to QuickBooks Error 6129

Some common symptoms experienced by the user due to error message 6129 include:

  • Repeated freezing of the system
  • Windows OS operates slowly to the keyboard and mouse.
  • This error keeps popping up when opening the company file.
  • The system experiences sudden crashes, especially when company file-related operations are being processed in QuickBooks.
  • Poor response time of the Operating system

Read it Also: How to Resolve QuickBooks Error Code 1926?

Multiple Solutions to Resolve QuickBooks Error 6129

Now that you know about the QuickBooks error message 6129 here are some ways by which you can rectify the problem.

Solution 1: Rename .ND and .TLG files

QuickBooks uses network data files to access the company file location within a network. Go through the following steps:

  • Navigate to the QuickBooks folder containing the company file.
  • Search for .ND files in QB folder.
  • After that, search for company files with the extension. ND.
  • Next, right-click the file and rename it with “OLD” extension at the end of the file.
Rename .ND and .TLG files.gif
  • Follow the same set of steps for .TLG files a well.

Solution 2: Use QuickBooks Database Server Manager

The walkthrough to use the QuickBooks Database Server Manager is given below:

  • In the very first step, open your computer and hit a Click on Start button.
  • After that, head to Programs, then click on QuickBooks.
  • Now open the company file.
  • Moving ahead, select QuickBooks Database Server Manager.
  • Then select the ‘Scan folders’ tab and choose the company file folder.
Scan and Add Folder option in QuickBooks Database Server Manager
  • In next step click on “Add folder” to add it and then click on the ‘Start Scan’ button.
  • Now click on the ‘Close’ button to close the window.
Scan Company File in QuickBooks Database Server Manager - Screenshot
  • Lastly, run QuickBooks and open the company file and check if the error has been resolved.

See it Also: How to Eliminate Error 377 in QuickBooks Online or Self-Employed?

Solution 3: Disable the Antivirus

Antivirus and firewall security programs can also hinder access to the company files. Therefore, the user has to change the configuration of security programs to make them conducive for QuickBooks operations. It is recommended by our experts to disable the antivirus and firewall security programs and then try opening the company files again. If the files open without showing the error, then such error is due to the security software-related obstruction. The steps to Disable the antivirus are:

  • Hit a right-click on the Antivirus icon on the Taskbar (bottom right corner).
  • After that, click on the Temporarily disable the antivirus protection option.
Disable the antivirus - Image
  • Moving ahead, run your QuickBooks as an system administrator.
  • Lastly, try to access the company file once more time.

Solution 4: Update QuickBooks Desktop

An outdated version of QuickBooks may also lead to such errors. Users should update QuickBooks to latest release.

  • At first, open QuickBooks and then go to the ‘Help’ menu.
  • After that select the ‘Update QuickBooks Desktop’ option
Update QuickBooks desktop
  • Now click on ‘Update Now tab and then select ‘Get Updates’ option to start the download process.
Update QuickBooks desktop (Screenshot)
  • This will commence the downloading process, and once it ends, restart your QuickBooks Desktop.
  • Lastly, comply with the on-screen commands and proceed to install the latest updates process.

See Also: What is QuickBooks Error 15243 and How to Fix It?

Solution 5: Copy and Paste the company file to Another Location

This procedure requires creation of a new folder and then moving the company files to this new folder. The process is given as follows:

  • Initially, create a new folder by hitting a right-click on Desktop and then click on New, followed by clicking on Folder option.
  • After that, head to the QuickBooks folder and press CTRL+ C keys to copy the company file.
  • Then, move to the newly created folder on the Desktop and paste the file by pressing the Ctrl + V keys together.
  • Moving ahead, run QuickBooks as System admin
  • And click on the Open or Restore Company option.
  • Now tap on Browse button and choose the company file you have copied to the Desktop folder.

Solution 6: Login as a Windows Administrator

If a user is logged in as admin this might cause problem. If you do not have admin login credentials you should find support for windows or consult our support team.

  • Hit right-click on the QuickBooks icon and then tap on Run as Administrator.
Run your QuickBooks as Administrator - Image
  • After that, hit on Open or Restore Company in your QuickBooks program.
  • Then click on Browse and select the company file. In case you cannot log in, contact our expert team.

Also Read: How to Eliminate QuickBooks Error Code 6069?

Solution 7: Run the Clean Install Tool from tools hub program

If the previous solutions fail to resolve the error, users should leverage the Clean Install Tool. The walkthrough below should aid you through.

  • Initially, you need to download and Install the ‘QuickBooks Tool Hub’ program from official website.
  • After that run the tool hub on your system and Open it.
  • Moving ahead, you need to tap on the ‘Installation issues’ option.
QuickBooks clean install tool - Image
  • And then choose the ‘Clean Install Tool’ tab.
  • Use the tool to uninstall QuickBooks and then rename the QuickBooks folder.
  • Now, re-install QuickBooks and use the license keys for registering.

Solution 8: Run the system on one domain

If the domain server and the client server doesn’t match that might give you the ongoing issue. So, you’ll have to get all the systems on the same domain and then re-launch QuickBooks. After this check if the problem is still persisting or not. In other fact, you can also connect to a network administrator to help connect all the systems in one single domain.

See Also: How to Resolve QuickBooks Payroll Error 30114?

Conclusive Lines

In the above article we have given all the steps for each of the solutions. Solving the QuickBooks error message 6129, 0 is easy if the user follows the methods provided in this article properly. However, if none of the solutions mentioned above work for you, we advise you to seek QuickBooks error support assistance from our experts. We are easily available through or 24/7 active helpline i.e., 1-800-615-2347.


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