Guide to Resolve QuickBooks Error Code 6129 0

Quickbooks are accounting software which is developed and introduced by Intuits. They are usually for small and medium-sized businesses and offer accounting applications and cloud-based versions. QuickBooks has some errors like Quickbooks error code 6129 0. While doing work if a message pops stating “Database connection verification failure” it’s an error called QuickBooks error 6129. This error is caused by system software which restricts the creation of the company file. 

What is Quickbooks Error Code 6129 0?

The Quickbooks Error Code 6129 0 when QuickBooks fails to connect to server and Quickbooks file will not open. The error code will occur as “Database connection verification failure”.There are various reasons behind Quickbooks error 6129 that we’ll discuss in this article and fix with the most effective solutions.

Solutions for Quickbooks Error 6129

There are various methods to rectify this error, that you can do yourself:

Method 1:  Renaming the network data (.nd) file

  • Open the QuickBooks company file.
  • Look for network data (.nd) extension
  • Right-click on it and then go for rename.
  • Just add .old at the end of the file name and press enter.

Method 2:  Stop Multi-User Mode

The main cause of Quickbooks Error code 6129 0 is multiple workstation modes. If you turn off the multi-user mode from the computer host, then you can rectify the error.   

You can follow these steps :

  • Launch the Quickbooks software, and go to the File tab.
  • From utilities, choose Stop-hosting multi-user Access

Also read: 10 common Reasons For Computer Not Turn On

Method 3: Disable Your Antivirus applications

Sometimes your computer cannot access company files from the network because your internet security and firewall settings cannot access Quickbooks from the server. So you need to disable the anti-virus. When your problem is solved do not forget to enable your security application.    

Method 4: Update Your Window 

As you know there are lots of bugs in the Windows operating system. So you should update your window to the latest version and the error could be rectified.      

Method 5: Use of Quickbooks File Doctor

  • Download and install the Quickbook Tool hub.
  • Then in the home window of the tool hub go for the company file issue and select the Quickbooks file doctor.
  • Then browse the company file from file explorer then click start
  • Detection will take about 10 to 20 minutes approx.
  • Then restart your system and operate the Quickbooks Program. 


This article explains about Quickbooks Error 6129 causes problems and its solution. I hope this satisfies your query. If still error is not fixed contact Quickbooks customer support they will surely fix your problem.