How to Prevent QuickBooks Error 612

QuickBooks is essential for businesses to manage finances, but errors like QuickBooks Error 6123 can disrupt workflow. This error typically appears when:

Opening a QuickBooks company file
Restoring a backup
Upgrading QuickBooks

Encountering QuickBooks Error 6123 while opening or restoring a company file? Follow this guide to troubleshoot and fix the issue. Call +1(866)408-0544 for expert support.

If you’re facing QuickBooks Error 6123, don’t worry! This guide explains the causes, step-by-step fixes, and prevention tips to keep your QuickBooks running smoothly.

What is QuickBooks Error 6123?

QuickBooks Error 6123 occurs when QuickBooks cannot establish a connection with the company file. The error message usually states:

“Error -6123, 0: Connection to the QuickBooks company file has been lost.”

This issue can affect both single-user and multi-user modes, making it critical to resolve as soon as possible.

Common Causes of QuickBooks Error 6123

Several factors can trigger this error, including:

Corrupt or damaged company file
Firewall or security software blocking QuickBooks
Multiple instances of QuickBooks Database Server Manager running
Issues with QuickBooks network setup
Special characters in the company file name
Corrupt QuickBooks installation

How to Fix QuickBooks Error 6123?

Follow these troubleshooting methods to resolve QuickBooks Error 6123.

Method 1: Run QuickBooks File Doctor

Download QuickBooks Tool Hub from Intuit’s official website.
Open QuickBooks Tool Hub and select Company File Issues.
Click Run QuickBooks File Doctor and select your company file.
Allow the tool to scan and repair any detected issues.
Restart QuickBooks and check if the error is resolved.

Method 2: Rename .ND and .TLG Files

Open the folder where your QuickBooks company file is located.
Find the .ND and .TLG files with the same name as your company file.
Right-click each file and select Rename.
Add .OLD at the end of the file name (e.g., CompanyFile.qbw.ND → CompanyFile.qbw.ND.OLD).
Try opening QuickBooks again.

Method 3: Move the Company File to Another Location

Copy the .QBW company file.
Paste it into a new folder or your Desktop.
Open QuickBooks and navigate to the new file location.
If successful, move the file back to its original folder.

Method 4: Disable Firewall and Security Software

Open your firewall or antivirus settings.
Temporarily disable them.
Open QuickBooks and check if the error is resolved.
If QuickBooks works, add it as an exception in your firewall settings.

Method 5: Create a New Windows User Profile

Go to Control Panel > User Accounts > Manage Another Account.
Click Add a new user and set it as an Administrator.
Log in with the new profile and try opening QuickBooks.

Method 6: Reinstall QuickBooks

Uninstall QuickBooks from Control Panel > Programs and Features.
Download the latest QuickBooks version from Intuit’s website.
Reinstall QuickBooks and enter your license details.
Open your company file and check if the issue is resolved.

How to Prevent QuickBooks Error 6123?

To prevent QuickBooks Error 6123 in the future, follow these best practices:

Keep QuickBooks updated to the latest version.
Regularly back up your company file.
Avoid using special characters in file names.
Ensure a stable internet connection when using QuickBooks in multi-user mode.
Configure firewall and antivirus settings to allow QuickBooks access.

Conclusion

QuickBooks Error 6123 can be frustrating, but by following the solutions outlined above, you can fix the issue quickly. If you still face problems, contact QuickBooks Support at +1(866)408-0544 for expert assistance.