How to fix QuickBooks Error 6000 77: Causes, Solutions, and Preventative Measures

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QuickBooks is an integral tool for many businesses, helping to manage accounting, payroll, and other financial aspects. However, users can occasionally encounter errors that disrupt its normal functioning. One such common issue is QuickBooks Error 6000 77, which typically occurs when attempting to access the company file. This article delves into the causes of this error, explores practical solutions, and offers advice on prevention, ensuring that QuickBooks users can maintain uninterrupted access to their financial data.

What is QuickBooks Error 6000 77?

QuickBooks Error 6000 77 typically manifests when users try to open their company file. This error can be a significant roadblock in businesses’ workflows, leading to delays and potentially compromising financial management tasks. Understanding what triggers this error is crucial to both resolving it and preventing future occurrences.

Causes of QuickBooks Error 6000 77

Several factors might cause this error:

  1. Incorrect File Path: The error often occurs if the QuickBooks company file is stored in an external storage device or a location that QuickBooks does not have permission to access.
  2. Network Descriptors: If the network descriptor (ND) file that allows QuickBooks to access the company file in a network or multi-user environment is corrupted, this error can be triggered.
  3. Permissions Issue: Insufficient permissions for the folder containing the company file can prevent QuickBooks from accessing necessary files, leading to Error 6000 77.
  4. Firewall or Security Software: Occasionally, firewall settings or security software might block QuickBooks from accessing the company file, considering it a security threat.
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Solutions to QuickBooks Error 6000 77

Step 1: Run QuickBooks File Doctor

Use the QuickBooks Tool Hub to run the QuickBooks File Doctor, which can automatically fix many common problems with your company file.

Download and Install QuickBooks Tool Hub:

  • Close QuickBooks.
  • Download the QuickBooks Tool Hub from the official Intuit website.
  • Install the downloaded file.

Run QuickBooks File Doctor:

  • Open the QuickBooks Tool Hub.
  • Go to the “Company File Issues” tab.
  • Click on “Run QuickBooks File Doctor.”
  • Please select your company file from the drop-down or browse to locate it.
  • Click “Check your file” and then “Continue“.
  • Enter your QuickBooks admin password and click “Next.

Step 2: Move Your Company File to a Local Drive

If your company file is stored on an external drive or a network location, move it to a local drive on your computer.

Locate the Company File:

  • Navigate to the folder where your company file (.QBW) is stored.

Move the File:

  • Copy the. QBW file.
  • Paste it into a local drive folder, preferably the default QuickBooks folder (C:\Users\Public\Public Documents\Intuit\QuickBooks\Company Files).

Step 3: Rename the.ND and . TLG Files

Renaming these files can resolve issues related to file accessibility.

Locate the.ND and . TLG Files:

  • These files will be in the same folder as your company file and have the same file name but with the.ND and . TLG extensions.

Rename the Files:

  • Right-click each file and select “Rename“.
  • Add “.OLD” to the end of each file name (e.g., company_file.qbw.nd.OLD).
  • QuickBooks will automatically recreate these files when you open the company file next.

Step 4: Check Folder Permissions

Ensure the folder containing the company file has the correct permissions.

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Navigate to the Folder:

  • Right-click the folder where the company file is saved and choose “Properties.”

Adjust Permissions:

  • Go to the “Security” tab.
  • Ensure that the user groups or user names listed have full control. If not, click “Edit” and set permissions to “Full Control“.

Step 5: Configure Firewall and Antivirus Software

Make sure your firewall and antivirus settings are not blocking QuickBooks.

Adjust Firewall Settings:

  • Access your firewall settings through the control panel or system settings.
  • Ensure QuickBooks has the necessary exceptions to communicate over your network.

Configure Antivirus:

  • Check your antivirus settings for any blocks or restrictions involving QuickBooks and adjust accordingly.

Step 6: Use QuickBooks Database Server Manager

If you’re using a network to host your company files, you can rescan them using the Database Server Manager.

Open QuickBooks Database Server Manager:

Rescan the Folders:

  • Add the folder containing your company file and click “Scan.”
  • This ensures the host computer can communicate effectively with user machines.

Preventative Measures

To prevent QuickBooks Error 6000 77 and similar issues in the future, consider the following best practices:

  • Regularly Update QuickBooks: Ensure that your QuickBooks software is always updated to the latest version, as updates often include fixes for known bugs and errors.
  • Proper File Storage: Always store your company files on a local hard drive and back them up regularly to prevent data loss.
  • Regular Network Maintenance: Maintain your network settings and ensure that your network is configured correctly, especially in multi-user environments.
  • Educate Users: Educate users on the proper handling and storage of company files and the importance of adhering to recommended practices for using QuickBooks.


QuickBooks Error 6000 77 is a disruptive issue that can impede the smooth operation of your business’s financial tasks. By understanding the causes and applying the recommended solutions, businesses can not only resolve this error efficiently but also take proactive steps to prevent its recurrence. Regular software updates, proper file management, and appropriate network setup are key to maintaining an error-free QuickBooks experience.

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