Books Handling

Step By Step Guide To Fix QuickBooks Error 6123

QuickBooks Error 6123

What is QuickBooks Error 6123

QuickBooks Error 6123 occurs when a user tries to open a company file over a network, in multi-user mode, or while restoring a backup. The error message, “Error -6123, 0: We’re sorry, but QuickBooks can’t open your company file,” suggests a connection issue that hinders access to the company file.

Causes of QuickBooks Error 6123

Understanding the roots of Error 6123 is essential for a targeted resolution. The causes can range from network issues to data file corruption. Here are some common triggers:

  • Network Connection Issues: Disruptions in the network connecting the host computer to QuickBooks can lead to this error.
  • Damaged QuickBooks Company Files: Corruption within the company file can prevent it from opening correctly.
  • Multiple QuickBooks Database Services Running: Conflicts arising from multiple instances of database services can cause Error 6123.
  • Firewall Settings: Overly restrictive firewall settings may block QuickBooks from accessing necessary network ports.
  • Corrupted Windows User: A damaged user profile can also contribute to this error.

Step By Step Guide To Fix QuickBooks Error 6123

Navigating through Error 6123 requires a systematic approach, focusing on both QuickBooks and environmental factors that might contribute to the issue. Follow this detailed guide to restore your access to QuickBooks company files:

Use QuickBooks File Doctor

QuickBooks File Doctor is a powerful tool designed to automatically diagnose and fix common issues, including company file errors.

  • Step 1: Download and install the QuickBooks Tool Hub from Intuit’s official website.
  • Step 2: Open the Tool Hub and navigate to the “Company File Issues” tab.
  • Step 3: Click “Run QuickBooks File Doctor” and select your company file from the list. If it’s not visible, browse and locate it manually.
  • Step 4: Choose “Check your file” (middle option) and click “Continue”. Enter your QuickBooks admin password if prompted and wait for the diagnosis to complete.

Rename .ND and .TLG Files

The .ND (Network Descriptor) and .TLG (Transaction Log) files help QuickBooks access the company file in a network or multi-user environment. Renaming these files can sometimes resolve Error 6123.

  • Step 1: Navigate to the folder where your company file is stored and locate the corresponding .ND and .TLG files.
  • Step 2: Right-click each file and select “Rename”. Add “.OLD” at the end of each file name (e.g., CompanyFile.qbw.ND.OLD).
  • Step 3: Open QuickBooks again and try to access your company file.

Move Your Company File

If the error occurs while trying to restore a backup, moving the backup file to a different location can help.

  • Step 1: Move the backup file (.QBB) to your local hard drive, avoiding external drives and network locations.
  • Step 2: Try restoring the backup from this new location.

Check Your Firewall Settings

Ensure that your firewall settings are not blocking QuickBooks from functioning correctly.

  • Step 1: Adjust your firewall settings to ensure that QuickBooks files have incoming and outgoing Internet access.
  • Step 2: You may need to add exceptions for QuickBooks in your firewall software.

Create a New Windows User

A corrupted Windows user profile can cause various issues, including Error 6123.

  • Step 1: Create a new user profile with administrative privileges in your Windows Control Panel.
  • Step 2: Log in with the new user profile, try to open QuickBooks and access the company file.

Disable Antivirus Software Temporarily

Sometimes, antivirus software mistakenly identifies QuickBooks processes as threats, leading to Error 6123.

  • Step 1: Temporarily turn off your antivirus or security software.
  • Step 2: Try to open your QuickBooks company file again. Remember to enable your antivirus software afterwards.


QuickBooks Error , while potentially frustrating, is a navigable obstacle with the right approach. By understanding its underlying causes and methodically applying the troubleshooting steps outlined in this guide.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top