QuickBooks is one of the most popular accounting software options available, helping businesses manage their financial data efficiently. However, users sometimes encounter technical errors that disrupt their workflow. One of the most common issues is QuickBooks Error Code 6123, which typically occurs when accessing a company file in multi-user mode or restoring a company backup file.
In this blog, we will explore the causes of Error Code 6123, symptoms to watch out for, and solutions to resolve it.
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What is QuickBooks Error Code 6123?
QuickBooks Error Code 6123 is a technical error that prevents users from opening or accessing their company files. It usually occurs during one of the following scenarios:
Opening a company file in multi-user mode.
Restoring a backup of the company file.
Upgrading QuickBooks Desktop while trying to access the company file.
The error message that accompanies this issue typically reads:
"Error 6123: Connection to the QuickBooks company file has been lost."
This error can be frustrating because it stops users from accessing important financial data, causing delays in work and potentially putting your business at risk if not resolved promptly.
Symptoms of QuickBooks Error Code 6123
You may be dealing with Error 6123 if you encounter any of the following:
Unable to open or restore a company file.
QuickBooks crashes or freezes while trying to access the company file.
An error message with code 6123 appears.
The company file does not open in multi-user mode.
Trouble upgrading to a newer version of QuickBooks while accessing the company file.
Causes of QuickBooks Error Code 6123
There are several potential reasons why you may encounter Error 6123 in QuickBooks:
1. Corrupt or Damaged Company File
The company file may have become corrupted or damaged, making it inaccessible and triggering the error.
2. Interruption from Third-Party Security Software
Firewall settings or antivirus software may block the connection to the QuickBooks company file, causing Error 6123.
3. Network Issues
Network configuration issues, such as improper settings in multi-user mode, can prevent users from accessing the company file on a network.
4. Damaged QuickBooks Program Files
Damaged or missing QuickBooks installation files can result in this error when accessing the company file.
5. Corrupt .ND (Network Data) File
A corrupt or damaged .ND (Network Data) file, which helps in configuring multi-user mode, can cause Error 6123.
6. Restoring Backup Over Network
Restoring a company file backup from a removable storage device or over a network instead of a local hard drive can lead to this error.
Solutions to Fix QuickBooks Error Code 6123
Now that we understand what can cause Error 6123, let’s dive into the steps you can take to resolve it.
Method 1: Use QuickBooks Tool Hub and File Doctor
QuickBooks Tool Hub is a collection of tools designed to resolve common QuickBooks errors. The File Doctor tool within this suite is specifically useful for repairing company file issues, including Error 6123.
Steps to Use QuickBooks Tool Hub and File Doctor:
Download QuickBooks Tool Hub: Go to the official Intuit website and download the Tool Hub.
Install and Open Tool Hub: Follow the installation instructions and then launch the Tool Hub.
Select Company File Issues: From the Tool Hub menu, click on the Company File Issues tab.
Run QuickBooks File Doctor: Select Run QuickBooks File Doctor, then choose your company file from the list or browse for it manually.
Let File Doctor Work: File Doctor will scan and repair any issues with the company file. Once the process is complete, try accessing the company file again.
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Method 2: Rename .ND and .TLG Files
The .ND and .TLG files are essential for QuickBooks’ multi-user functionality. If these files are corrupt, renaming them may fix Error 6123.
Steps to Rename .ND and .TLG Files:
Find the Files: Navigate to the folder where your QuickBooks company file is stored.
Locate .ND and .TLG Files: Look for the files with the same name as your company file but with .ND and .TLG extensions (e.g., companyfile.qbw.nd and companyfile.qbw.tlg).
Rename the Files: Right-click on the .ND and .TLG files and select Rename. Add .old at the end of the filenames (e.g., companyfile.qbw.nd.old).
Restart QuickBooks: Reopen QuickBooks and try accessing your company file.
Method 3: Disable Third-Party Security Software
Sometimes, third-party firewall or antivirus software can block QuickBooks’ access to company files, causing Error 6123. Temporarily disable your antivirus or firewall and check if the error persists.
Steps to Disable Antivirus or Firewall:
Open Security Software: Navigate to your antivirus or firewall settings.
Temporarily Disable Protection: Disable the security software temporarily, but make sure to turn it back on once you’ve tested QuickBooks.
Check QuickBooks: Open QuickBooks and see if you can now access your company file without encountering the error.
Method 4: Restore Backup Locally
If you’re restoring a company file backup over a network or from a removable storage device, try moving the backup to a local drive.
Steps to Restore Backup Locally:
Move Backup File: Copy your QuickBooks backup file (with a .QBB extension) from your external device or network to your local hard drive.
Open QuickBooks: Launch QuickBooks and select File > Open or Restore Company > Restore a Backup Copy.
Select Local Backup: Choose the local copy of your backup file and follow the prompts to restore it.
Method 5: Update QuickBooks Desktop
Using an outdated version of QuickBooks can cause compatibility issues, leading to errors like 6123. Updating your software may resolve the issue.
Steps to Update QuickBooks Desktop:
Open QuickBooks: Launch QuickBooks Desktop.
Go to Help Menu: Select Help > Update QuickBooks Desktop.
Update Now: Click on the Update Now tab and then select Get Updates.
Restart QuickBooks: Once the updates are installed, restart QuickBooks and check if the error is resolved.
Method 6: Create a New Windows User
Sometimes, issues with the Windows user account can cause Error 6123. Creating a new Windows user with administrator rights may help resolve the problem.
Steps to Create a New Windows User:
Open Control Panel: On your computer, go to Control Panel > User Accounts > Manage Another Account.
Create New User: Select Add a New User and follow the prompts to create a new user with administrator rights.
Log In: Log out of your current Windows account and log into the new account.
Open QuickBooks: Try accessing the QuickBooks company file again.
Preventing QuickBooks Error Code 6123
While it’s essential to know how to fix Error 6123, prevention is equally important. Follow these tips to avoid running into this issue:
Regular Backups: Frequently back up your company file to avoid data loss and corruption.
Keep QuickBooks Updated: Always use the latest version of QuickBooks to prevent compatibility issues.
Use Proper Hosting Setup: Ensure your hosting setup is configured correctly if you’re using multi-user mode.
Monitor Security Software: Configure your firewall and antivirus to allow QuickBooks access to necessary files.
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Conclusion
QuickBooks Error Code 6123 can interrupt your workflow, but it’s fixable using the methods mentioned above. Whether it’s repairing the company file, disabling third-party software, or renaming essential files, the key is identifying the root cause of the issue and applying the appropriate fix.
If you continue to experience Error 6123 or need additional help, don’t hesitate to reach out to QuickBooks support at +1-888-538-1314. With professional guidance, you can resolve the issue and return to managing your business finances with ease.