How to Fix QuickBooks Error 6129, 0 (Database connection verification failure)

QuickBooks Error Code 6129 0 is an error code that the user sees on the verification during the database connection failure or when the QB tries accessing the company files. When this error crops up, The QuickBooks users are not able to open the company file. The computer and the server holding the computer file will not be found if there is a network error in the software used network.

When you are creating or opening a QuickBooks Desktop company file, you may come across the error messages as follows.

Error code: -6129, 0: Database connection verification failure

QuickBooks error code 6129 – Screenshot

We have provided a detailed discussion about this QuickBooks error 6129, 0 in this blog post. All the possible causes behind this error, along with the quick fixation guides is also been provided here. You can reach us by contacting our technical support team in case of emergency help for this error.

The Possible Causes Behind the QuickBooks Error 6129, 0

There are many reasons behind the QuickBooks error 6129, 0. Some of them are as follows:

  • The latest QuickBooks version is not being used, instead, the computers are used in multi-user configuration mode
  • Presence of a corrupted network of the data file
  • The client and server domain discrimination
  • The up-gradation of a company file to the latest QuickBooks Desktop version of a non-Windows Administrator profile
  • Presence of a network data file (.ND) that is damaged

How to fix this QuickBooks Error 6129, 0?

The easiest and most effective troubleshooting methods for resolving the error code 6129, 0 are provided below. But, before you jump on to trying out the solutions given below, we suggest you consider trying out two conditions first:

Condition 1: A new company file is created:

  • Select the option of “Exit or leave” on the easy action Interview window.
  • Then “Save the file“ and choose the “Yes” option.
  • Try to input a different file name, and then select the “Save” option.
  • Please Note: If it does not work even after changing the file name, then the file location is to be changed.

Condition 2: Opening or updating the company file:

Firstly, begin with opening a sample company file to check and confirm if the problem is related to the related or not. If you are facing this issue for all your company files, then move on to the solving methods.

Also, make sure to log in as a Windows System Administrator before beginning with the steps.

Below provided are multiple troubleshooting steps that you need to follow for fixing the QuickBooks Error 6129, 0. Make sure to update all the computers that are used updated to the latest version of QuickBooks.

Solution 1: Log in as the Administrator of Windows

  • Run as Administrator – Screenshot
  • Open the company file.
  • Log in as “System Administrator” in Windows
  • Update the required company file
  • For logging in as an Administrator, take help from an IT professional.

Solution 2: The Antivirus and other Software are to be Disable if you are using the Windows on Safe Mode

  • Reboot the machine in “Safe Mode”
  • Go to the active antivirus software and disable it.
  • Make a new Company File.
  • Restart the computer, this time in Normal Mode.
  • Open the QuickBooks and the Company File.

Solution 3: The QuickBooks Network Files (.ND) should be renamed

  • Rename.ND and.TLG files- screenshot
  • Begin with opening the folder where you have saved your company file.
  • Go to your hard drive or system and look for the QuickBooks files named with the extension “.nd”.
  • The file should be renamed to an old company file name. This can be done by right-clicking on the file and selecting the “Rename” option.
  • Enter “.OLD” in the file extension and click on “Enter”.

If you want access to the same company file on different computers, then follow these steps for all the files.

If the Company File is used on a single computer, then open the file from there itself.

  • Go to the Windows Start Button > Programs > QuickBooks > QuickBooks Database Server Manager.
  • Choose the “Scan Folders” Tab.
  • If there is no folder with the required Company File, then Add a “new Folder”.
  • Select the “Scan” tab
  • Click on the “Close Option” after you have completed the Scan.
  • Lastly, Open the “Company File”.

Solution 4: The company file to be copied to a different location

  • Make a “New Folder“.
  • Now, Move the QuickBooks Company Files that are required to the folder you have created already.
  • If you are using QuickBooks on one computer, then follow the provided steps.
  • But if are using the same file on different systems, then follow the “Next” steps.
  • Go to the Windows Start Button > Programs > QuickBooks > QuickBooks Database Server Manager.
  • Click on the “Scan Folders” Tab.
  • If there is no folder with the required Company File, then Add a “new Folder”.
  • Select the “Scan” tab
  • Click on the “Close Option” after you have completed the Scan.
  • Lastly, Open the “Company File”.

Solution 5: Check if all the connected Computer are on a single Domain

For connecting all the computer systems in a single domain, make sure to contact a “Network Administrator” or an “IT professional”

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