06/03/2025 às 08:17

📲 1.855.738.2891 How to Fix QuickBooks Error 6123, 0: Causes and Step-by-Step Solutions

3min de leitura

QuickBooks is a widely used accounting software, but like any technology, it’s not immune to errors. One such issue is QuickBooks Error 6123, 0, which typically occurs when opening or restoring a company file. The error message usually states:

"Error 6123, 0: Connection to the QuickBooks company file has been lost."

This can be frustrating, especially if you rely on QuickBooks for daily financial tasks. But don’t worry—this guide will help you understand why this error happens and how to fix it quickly.

What Causes QuickBooks Error 6123, 0?

This error can occur for several reasons, including:

Corrupt Network Data (.ND) or Transaction Log (.TLG) Files – These files help QuickBooks access your company file in multi-user mode. If they become damaged, they can cause errors.
Firewall or Antivirus Restrictions – Security software may block QuickBooks from accessing your company file over a network.
Incorrect Folder Permissions – If the folder containing the company file lacks proper access permissions, it can cause connection issues.
Multiple QuickBooks Database Services Running – If multiple instances of QuickBooks Database Server Manager are running, they may interfere with each other.
Company File Name Issues – Using special characters in your file name or having a very long file name may prevent QuickBooks from opening it.

How to Fix QuickBooks Error 6123, 0

Here are some simple yet effective methods to resolve this issue:

Solution 1: Rename .ND and .TLG Files

Go to the folder where your QuickBooks company file (.QBW) is stored.
Locate the .ND and .TLG files that have the same name as your company file.

Example:
CompanyName.qbw.nd
CompanyName.qbw.tlg

Right-click on each file, select Rename, and add “.OLD” at the end.

Example: CompanyName.qbw.nd.OLD

Open QuickBooks and try accessing your company file again.

Solution 2: Use QuickBooks File Doctor

QuickBooks provides a tool called File Doctor to repair company file issues.

Download and install QuickBooks Tool Hub from the official Intuit website.
Open Tool Hub and go to the Company File Issues tab.
Click Run QuickBooks File Doctor and select your company file.
Click Check your file and follow the on-screen instructions.

Solution 3: Move the Company File to a Different Location

Copy your .QBW file to your desktop.
Open QuickBooks and click Open or restore an existing company.
Select Open a company file, then browse for the copied file on your desktop.
If it opens successfully, move the file back to its original location.

Solution 4: Disable Firewall and Antivirus Temporarily

Open your Firewall or Antivirus settings.
Look for QuickBooks-related services and allow them through the firewall.
If the issue persists, temporarily disable your firewall and antivirus, then try opening QuickBooks again.

⚠️ Don’t forget to turn your security software back on after testing!