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How to Fix QuickBooks Error 6123 0?

QuickBooks Error 6123

QuickBooks error 6123, 0 occurs when a user tries to open or update QuickBooks desktop using multi-user mode. The QuickBooks error 6123, 0 happens due to a damaged network connection, a database service is not running, or the host system is not the same. QuickBooks Error 6123 can be solved by running the QuickBooks File Doctor Tool that scans and resolves the error.

QuickBooks Error 6123

Error: QuickBooks Error 6123, 0

Error Message: We’re Sorry. QuickBooks couldn’t open your company file. We’ll try to fix the problem. Click Start to begin. If the problem continues, contact support for assistance and report the error code (-6123, 0).

QuickBooks stores the financial records in the company file. While coping with a competitive edge when the user tries to upgrade the company file they may face QuickBooks error code 6123. It usually occurs while opening a company file from a network server or restoring a backup. It will interrupt the entire process and create a frustrating scenario. Let’s delve into the QuickBooks error 6123 resolve guide to tackle this quickly. Before proceeding it is recommended to know the overview and causes behind the issue.

What is QuickBooks Error 6123 0?

Many technical glitches provoke errors in the accounting software. Among that QuickBooks Won’t open my company file error 6123 usually occurs while restoring the company files from the backup created on the hard disk or when you try to access the company file through a multi-network server. You need to find the relevant guide to identify the issue and implement the troubleshooting resolutions to fix error 6123.

Quick Overview of QuickBooks Error 6123, 0

Error Code:QuickBooks Error 6123, 0Developer:Intuit Inc.
Error Description:We’re Sorry. QuickBooks couldn’t open your company file. We’ll try to fix the problem.Software:QuickBooks
Symptoms:The QuickBooks Desktop won’t respond or work, Windows operating system got frozen.Applies to:Windows 10, and 11
Cause:A file from the company has been damaged, The data files or software files in QuickBooks are damaged or corrupted.Solution:Download QuickBooks File Doctor, Change The Location of Your Company File in The QuickBooks

Possible Causes of QuickBooks Error 6123

There are certain factors responsible for QuickBooks error 6123 opening older QuickBooks files or QuickBooks error 6123 cannot contact the database server.

If you get QuickBooks error 6123, Some of the primary causes are mentioned below:

  1. The network connection with the computer where it is hosted is disrupted.
  2. The firewall setting is disturbed.
  3. The QuickBooks database service is running.
  4. The name of the host computer is changed.
  5. You are trying to take a backup directly on a flash drive or any other kind of storage device.
  6. A file from the company has been damaged.
  7. If the company file was restored from an external storage device.
  8. Windows that have been damaged or corrupted.
  9. If an antivirus product is installed on the computer, it may obstruct the communication process.
  10. Windows user and QBW files have been corrupted.
  11. The data files or software files in QuickBooks are damaged or corrupted.

Error with the same symptoms and causes

The most common QuickBooks company file errors with the same kind of problem. Some of them are; QuickBooks 6000 80, QuickBooks 6000, QuickBooks 6000 816, QuickBooks 6143, QuickBooks 6150 1006

Symptoms of QuickBooks Error 6123, 0

When a system hits QuickBooks Error 6123, it may behave like the given below:

  1. The QuickBooks software doesn’t work properly or does not respond to any command.
  2. The operating Windows system froze.
  3. The input or Command given through the mouse or keyboard is taking too much time.
  4. The QuickBooks keeps crashing or hanging in between.
  5. The operating windows get crashed again & again.

System Requirements to Avoid QuickBooks Error 6123, 0

To avoid QuickBooks Error 6123, your computer system must have the given below requirements.

  • Operating systems must be Windows 10 and 11.
  • The System must have a minimum of 2.0 GHz processor.
  • The system must have a minimum of 512 MB RAM required.
  • A high-speed internet connection is required for smooth operations.
  • The operating Windows system must have an Internet Explorer (IE) browser 6.0 version or above.
  • The system must have at least a 4xCD-ROM drive.

Solutions to Fix QuickBooks Error Code 6123, 0

However, make sure to try out all the given solutions in the order given below:

Condition 1: If the error 6123 is experienced while restoring a backup (.qbb) on a new system

Solution 1: Create A Portable Company File (.qbm) to Restore The Company File

Create A Portable Company File (.qbm) to Restore The Company File - QuickBooks Error 6123

You can come across QuickBooks Error 6123, 0 while trying to restore the backup on a new computer. If you copy the file to the hard disk in a new system then it would not assist you to avoid the issue. To eliminate the error, you need to create a portable company file (.qbm) and then perform the restore. The detailed steps are presented below:

In this case, it’s a good idea to make a portable corporate file. After that, you must use it to restore the company file. The following are the steps to follow in this method:

  • On the same computer that was used to create the backup company file, open the QuickBooks Desktop
  • Open the company’s original file
  • The following step is to make a portable version of the company file
portable company file
  • On the new system, open the QuickBooks desktop.
  • Instead of using the backup file, you can restore the company file using the portable copy.

Solution 2: Auto Data Recovery Function Usage

Auto Data Recovery (ADR) is a built-in recovery feature of the QuickBooks Desktop File Doctor Tool. It helps in recovering and restoring lost QB data. There is a slight chance that the file is corrupted and this might eradicate QuickBooks error 6123 0 error. You just need to carry out the steps given below:

  1. To restore the recent transactions, use the latest transaction Log (.TLG Log) file and a copy of the company file (.QBW). 
  2. Use a copy of both .QBW files and .TLG file to restore all the data except for the transactions performed in the last few hours.

Condition 2: Manually configure the multi-user setup

The manual configuration of the multi-user setup won’t let you encounter QuickBooks Error 6123, 0. So, it’s necessary to configure its settings by following the instructions below:

Solution 1: Renaming .ND and .TLG files

  • To begin, go to the company file folder and open it
  • The company files.ND file should be selected
  • Right-click on the .ND file and then select rename from the menu
  • .old should be added to the end of the file name
  • For the.TLG file, follow the same steps
  • Open the company file in QuickBooks Desktop
  • Using database server management, re-scan the company file
  • Stop the database server process first.
Windows 7
  • If you’re using Windows 7, it is recommended to press the Ctrl + Alt + Delete keys from your keyboard
  • Select the task manager option
  • From the processes tab, select the image name column heading
  • End the task by right-clicking QBDBMgrN.exe
  • To stop all instances of QBDBMgrN.exe, repeat the instructions
  • The task manager should now be closed.
Windows 10 and 11
  • You should first press the Windows key, then type task manager into the search box
  • Then select More Details from the task manager
  • When you’re done, go to the Details tab
  • Right-click on QBDBMgrN.exe
  • End the task by clicking on it
  • Repeat these instructions till QBDBMgrN.exe is no longer running
  • The task manager should be closed now.
Restarting the QuickBooks services
  • To launch the run window, hit Windows + R
  • Press the enter tab after typing service.msc
  • To order the entries alphabetically in the services window, use the name column heading
  • Choose the Start tab by right-clicking on the QuickBooks desktop version’s handy service
    • QuickBooks Desktop 2024 or QB Enterprise 21.0: QuickBooks DB34
    • QuickBooks Desktop 2023 or QB Enterprise 20.0: QuickBooks DB33
  • At last, close the services.

Re-scanning the company files

Solution 2: Setting up proper folder permissions

The folder containing the QuickBooks desktop company file is present on the host machine, which should be noted. Furthermore, all users, including the database server manager, must have complete control.

Solution 3: Moving the company file to a different location

You can test whether there is a problem with the file path by moving the file to a different location and then opening it from there to see whether it works.

Solution 4: Checking firewall & Antivirus ports

The firewall and antivirus software may occasionally prevent the program from accessing the company file. To avoid further prompts, check the firewall and internet security settings for the QuickBooks desktop.

Solution 5: Toggle hosting settings in QuickBooks

  • To begin, open the company file
  • Select the file menu and then select the “Switch to Single-User Mode” option
switch company file to single user mode
  • Select File >>> Utilities >>> Stop Hosting Multi-User Access from the drop-down menu
  • The next step is to go to File >>> Utilities > >> Host Multi-User Access
The next step is to go to File >>> Utilities > >> Host Multi-User Access
  • In the end, you must choose the file as well as switch to multi-user mode.
switch to multi-user mode

Condition 3: Error occurs when opening or upgrading your company file

Solution 1: Verify The Characters in The File Name

The QuickBooks Error 6123, 0 may show up if the users won’t check if the company file covers the following factors or not. The steps are here to proceed ahead:

  • The characters should be less than 30
  • The company name should not contain spaces or special characters

Solution 2: Download and use The QuickBooks Tool Hub

Download & Use The QuickBooks Tool Hub to fix the quickbooks error 6123

As you are familiar with the fact that the QuickBooks Tool Hub is a collection of various tools that can be used to disappear almost every error that occurs in QuickBooks. Quick Fix My Program is a tool that is specifically created to refresh QuickBooks Installation and re-register the installation files. This will assist the user in removing the general company file and program errors like 6123. Here are the steps to download and install QuickBooks Tool Hub to run Quick Fix My Program

Steps to use and download the QuickBooks tool hub:

  • On the preferred location
  • Locate the downloaded file and click on it
  • Go through the onscreen instructions on the prompt to start the installation and also confirm the license agreement
  • Wait till the process completes
  • After that, the user needs to locate the icon that appears on the Windows Desktop
  • It will open the tool hub Window
  • Choose the program problems
  • Hit on the Quick Fix My program
  • It might take some time to execute. It usually varies with the multiple versions of the accounting software
  • Once the process completes re-open QuickBooks and check whether the error is fixed or not

Solution 3: Change The Location of Your Company File in The QuickBooks

Change The Location of Your Company File in The QuickBooks to fix error 6123

If you fail to open your QuickBooks company file, try moving it to a different location and then open it. Moreover, if you are using a server connection, try copying files on the computer you are using QuickBooks and open it. Moving the company file location is the best way to get rid of QuickBooks Error 6123, 0.

Here are the steps included in this section : 

  1. To check if there is an issue with your file path, you would have to change the location of your file and then open it from there to verify if it works properly. 
  2. Switch to the folder where the company files are located.
  3. Hit a right-click on the company file and click copy.
  4. Make sure that you have copied the right file with the file extension .QBW.
  5. Moving ahead, copy the file to the desktop and make right-click on the blank space, and then select new and folder options respectively.

Solution 4: Make A New Windows User


To repair the QuickBooks Error 6123, 0, create a user in your Window. To do so, carry out the following steps: Many computers might get corrupted after the Windows operating system is upgraded. Therefore, you are required to create a new user in your window so that you don’t see an error message QuickBooks Error 6123, 0 on your screen.

Here are the steps:

  • Initially locate the Control Panel option
  • Hit on the Create New User choice button in the icon which says, User
  • Select the Administrator of the user type
  • You need to log in from the existing one
  • Restart the system and then log into the system with the new user credentials
  • Discover the company file and then move it to the desktop
  • At last, open your QuickBooks and then try to open the company file

Solution 5: Try Restarting Your PC in Safe Mode

QuickBooks Error 6123 - Try Restarting Your PC in Safe Mode

Sometimes, QuickBooks Error 6123, 0 may take place if there’s a problem with your system. Therefore, it’s recommended to reboot your system in a safe mode. For this, you can go through the steps described below:

The process to Restart your PC in Safe Mode:

  • By restarting your computer in safe mode, all third-party apps will be disabled, preventing
  • QuickBooks Desktop from running
  • In safe mode, you can also try temporarily disabling third-party security apps.

Solution 6: Disabling The System Security Programs


It is noticed that when the antivirus program interferes with the company file and considers it as malware, this will restrict the user from opening the QuickBooks company file. In such a scenario, you need to disable the antivirus program and then try to open a company file. This might keep you away from QuickBooks Error 6123, 0. Here’s how:

If you use McAfee security software, this could be the cause of the problem. Antivirus software frequently interacts with company files and considers their malware. This may prevent you from accessing the corporate file. In this case, you must first disable QuickBooks and then access the company file.

Solution 7: Re-installation of QuickBooks Application

Re-installation of QuickBooks Application

After executing all the solutions, if still, you are not able to access the company file then the real cause might not be visible in the current copy of the QuickBooks desktop. So, you are required to install a fresh copy of the QuickBooks Desktop after completely removing all the traces of the current installation. Otherwise, the QuickBooks Error 6123, 0 will keep hampering your workflow. Check out the following steps to continue:

Methods to Re-install QuickBooks Application:

  • From the control panel tab, uninstall the current QuickBooks version
  • Use the QuickBooks installation CD or download the QuickBooks version you want to use on the machine
  • Install QuickBooks in its default setting
  • There, enter the product ID and license number
  • QuickBooks will be registered and activated after entering the credentials
  • Finally, open the company file.

Solution 8: Company File Restore

Restore the Company File to resolve QuickBooks Error 6123

If you are trying to restore the company file from a backup that is not stored on the hard drive then This will instigate QuickBooks Error 6123, 0. It is a nice approach to save a copy of the backup file on an external storage device or online. Or if you try o restore the (.qbb) file saved elsewhere, the error may occur, but there is a pretty easy method to fix it. So, let’s implement the below-listed actions:

How to resolve if the QuickBooks error code (-6123 0) is found while backup restores on a new computer:

To deal with this situation the user needs to make a portable company file. Follow the below-mentioned steps:

  • First of all, open the QuickBooks desktop on the same computer used to make the company file backup
  • Now open the original company file on the system
  • Make a portable company file
  • The proceeding step is to open the QuickBooks desktop on the new computer
  • At last, the user is required to use the portable copy to restore the company file

Solution 9: Running Quick Fix My Program

Running Quick Fix My Program - QuickBooks Error 6123

In case the issue with the files is not being resolved by renaming them or moving them to another location, the problem could be with the contents of the file or network issues. Use the provisions in the QuickBooks Tools Hub to mend the QuickBooks Error 6123, 0. The QuickFix my Program is used for resolving many issues with the application. 

It is expected to perform the following steps for this method:

  • In the QuickBooks Tools Hub, go to Programs Problems and select the same
  • Choose the tab for Quick Fix My Program
  • It could take up to a minute to run the program or might take more than a minute to open QuickBooks if you have numerous versions installed on your machine
  • When Quick Fix My Program is complete, open QuickBooks and double-check that the issue has been resolved.

Solution 10: Download and Install QuickBooks File Doctor

download install & run quickbooks diagnostic tool to resolve quickbooks error 6123

In the below section, you will learn the easiest way to download and use the QuickBooks File Doctor tool. This will assist you to get rid of QuickBooks Error 6123, 0. Here are the steps you need to perform: 

Steps to download the QuickBooks File Doctor

  1. The first step is to download the QuickBooks Tool hub and then hold and press the Ctrl + J keys simultaneously on your keyboard to move to the downloads.
  2. Now, you need to save the file somewhere you can easily access it.
  3. Then, hit a click on the QuickBooksToolHub.exe to open the file.
  4. To accept the license agreement, you have to tap on Yes. 
  5. After this, press the Next icon and select the Install option. 
  6. Once the installation process comes to an end, you are supposed to hit the Finish tab.
  7. Furthermore, you have to click on the icon to open the QuickBooks Tool Hub.
    Note: If you cannot find the icon, press the Windows or Start key on your keyboard and look for QuickBooks Tool Hub then choose the program to open it. 
  8. When the QuickBooks Tool Hub program opens, navigate to the company file issues option and carry out the steps to run the QuickBooks File Doctor Tool.

Steps to Run the QuickBooks File Doctor 

  1. To run the QuickBooks File Doctor Tool, you need to press the company file issues tab from the tool hub.
  2. Now, you have to choose the QuickBooks File Doctor option. This step might take some time so you have to wait for a while. 
  3. In the QuickBooks File Doctor, select the company file from the drop-down menu. If you fail to see the file, then it can browse and search for the file.
  4. Also, you are required to select check the file option and click Continue. 
  5. Finally, enter the QuickBooks login credentials and press Next.

Solution 11: Give a New Name to .ND and .TLG

Give New Name to .ND and .TLG to resolve the quickbooks error 6123 (1)

It’s mandatory to rename the .ND and .TLG files if you don’t want to experience QuickBooks Error 6123, 0 on your computer screen. To do so, follow the steps inclined below:

Here are the steps you need to follow:

  • Initially locate the folder with the company file and open it
  • Now select the required .ND file of the company
  • Once done you have to right-click on the company file
  • Select Rename button
  • Find the .ND file and give a name to .ND.OLD 
  • Select the .TLG file and rename it as previously 
  • At last, try to open the QuickBooks Company file

Solution 12: Set The Correct Folder Permissions

Set The Correct Folder Permissions to resolve quickbooks error 6123

Sometimes, the folder settings require to be set to full access. It relies on the Windows settings and Windows user login. Also, it’s mandatory to do if you want to end up with QuickBooks Error 6123, 0. So, let’s adhere to the steps provided below:

  • Firstly discover the company file folder in your host system
  • It should permit control to the users with the QB database server manager user

Manually Resolve QuickBooks Error Code 6123, 0

In case, downloading and running QuickBooks File Doctor didn’t fix your problem, then it is suggested to fix the error manually.

However, before attempting the below-given troubleshooting procedures:

  • Reboot your computer to close all the programs that might be opened. In addition to this, it will also reload the OS as well as reestablish network connections.
  • If the version of QuickBooks Desktop you use is a single-user installation then turn off multi-user hosting.

Now choose the situation that you think suits your problem. For instance, if you installed or updated security software or firewall lately, you can try to fix the problem by going to your firewall settings. 

If you aren’t sure, follow the given below solutions:

1. Check the network connection with your host computer

  • In case you have a wired connection then don’t forget to check the network connections and cables on both the host computer as well as the client computer and try to browse the QuickBooks company file.
  • Check whether all the other programs along with the resources located on the host computer can be easily accessed. In case not, reboot the host computer- doing so may resolve the problem. If rebooting the issue fixes the problem, the problem might be with the network. Due to the complexity of the wired and wireless networks, your QuickBooks might not get enough support for network configuration.

2. Check the firewall settings

  • Check if your firewall or the security software is equipped with all the latest updates as well as network access.

3. Check for hibernation or standby mode on the host computer

If the host computer is either in hibernation or standby mode, it can disable your to access your QuickBooks file. To fix the problem, reconfigure or disable the settings of your host computer.

4. Repair damaged network data files (*.nd)

  • Press Windows+E on your keyboard. Windows Explorer will open.
  • Go to the folder containing the company file.
  • Now right-click on the file having the same name as your company file as well as the extension .nd.
  • Select Rename and change the extension to .ndold.
  • Press Enter. Then open QuickBooks Desktops and then the company file. QuickBooks Desktop will now make a new data file for your company file.

Once done, toggle hosting off and then on at the host computer

  • Open QuickBooks Desktop.
  • Now open the company file.
  • Select File and then choose Switch to Single User Mode.
  • Select File and choose Utilities
  • Now click on Stop Hosting Multi-user Access.
  • Again select File and choose Utilities
  • Then select Host Multi-user access.
  • Then select File and choose Switch to Multi-User Mode.


  1. What do you understand with QuickBooks error 6123?

    According to Intuit, “Connection to the QB company file has been lost” pops up when users try to open a company file over a network in multi-user mode or you’re upgrading a company file to a newer QuickBooks version.

  2. What are the various probable ways to get rid of QuickBooks error 6123?

    You can easily get rid of this error code just after following any of the below methods:

    💠 Download the QB file doctor
    💠 By renaming .ND & .TLG file 
    💠 By moving your company file to another location 
    💠 Using the Auto data recovery function 
    💠 Disabling the System Security programs  
    💠 Reinstall the QuickBooks application 
    💠 Create a new Windows user
    💠 Set proper folder permissions

  3. What can be the reasons behind the occurrence of QuickBooks error 6123?

    QuickBooks error code 6123 was caused due to several reasons such:

    💠 Restoration of the company file from an external storage device.
    💠 Disrupted host server connected to the network.
    💠 Damaged data file for QuickBooks Company.
    💠 Firewall settings that interrupt QuickBooks to open a business.
    💠 The McAfee Antivirus program will be mounted on your computer. QuickBooks Desktop Services are messing with it.
    💠 Damaged Windows.
    QuickBooks error code 6123 was caused due to several reasons such:
    💠 Restoration of the company file from an external storage device.
    💠 Disrupted host server connected to the network.
    💠 Damaged data file for QuickBooks Company.
    💠 Firewall settings that interrupt QuickBooks to open a business.
    💠 The McAfee Antivirus program will be mounted on your computer. QuickBooks Desktop Services are messing with it.
    💠 Damaged Windows.

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