Resolving QuickBooks Error 6000 77: A Comprehensive Troubleshooting Guide

QuickBooks Error 6000 77 is a common issue that occurs when trying to access, open, or restore a QuickBooks company file. This error message indicates that QuickBooks is unable to open the company file due to file damage, file location issues, or inadequate file permissions. Error 6000 77 can be frustrating as it prevents users from working with their QuickBooks data. In this comprehensive guide, we will provide detailed troubleshooting steps to resolve QuickBooks Error 6000 77 and ensure smooth access to company files.

Causes of QuickBooks Error 6000 77: QuickBooks Error 6000 77 can occur due to various reasons, including:

  1. Damaged company file: If the company file (.QBW) is damaged or corrupted, QuickBooks may display Error 6000 77 when attempting to access it.
  2. Incorrect file extension: QuickBooks requires company files to have the .QBW extension. If the file has a different extension or is named incorrectly, Error 6000 77 may occur.
  3. File location issues: If the company file is stored in a restricted or inappropriate location, QuickBooks may encounter difficulties accessing it, resulting in Error 6000 77.
  4. Insufficient file permissions: Inadequate or incorrect file permissions can prevent QuickBooks from opening the company file, leading to Error 6000 77.
  5. Third-party security software interference: Certain security software programs may mistakenly flag the QuickBooks company file as a threat and block access, triggering Error 6000 77.

Now, let’s proceed to the troubleshooting steps to resolve QuickBooks Error 6000 77:

Step 1: Copy the Company File to the Local Hard Drive

  1. Navigate to the location where the company file is currently stored.
  2. Right-click on the company file and select “Copy.”
  3. Paste the copied file onto the local hard drive, such as the desktop or C: drive.
  4. Open QuickBooks while holding the Ctrl key to bypass the auto-opening of a company file.
  5. From the No Company Open window, click on “Open or restore an existing company.”
  6. Browse to the location where you pasted the company file on the local hard drive and open it.
  7. If the file opens successfully, it indicates that the original file location may have been causing the issue.

Step 2: Rename the .TLG and .ND Files

  1. Close QuickBooks on all workstations that have access to the company file.
  2. Navigate to the folder where the company file is stored.
  3. Locate the files with the same name as the company file but with the .TLG and .ND extensions (e.g., companyfile.qbw.tlg and companyfile.qbw.nd).
  4. Right-click on each file and select “Rename.” Add the word “OLD” at the end of the file name (e.g., companyfile.qbw.tlg.OLD).
  5. Open QuickBooks again and try to access the company file. QuickBooks will automatically recreate the .TLG and .ND files.

Step 3: Check Folder Permissions

  1. Right-click on the folder where the company file is located and select “Properties.”
  2. Go to the “Security” tab and ensure that the user account accessing the file has the necessary permissions.
  3. If the user account is not listed, click on “Edit” and add the account with Full Control permissions.
  4. Apply the changes and try accessing the company file again.

Step 4: Disable Third-Party Security Software

  1. Temporarily disable any third-party security software (antivirus, firewall, etc.) installed on your computer.
  2. Refer to the software’s documentation or support resources for instructions on how to disable it.
  3. Open QuickBooks and try accessing the company file. If Error 6000 77 no longer appears, it indicates that the security software was interfering with QuickBooks.

Step 5: Use the QuickBooks File Doctor Tool

  1. Download and run the QuickBooks File Doctor Tool from the official Intuit website.
  2. Follow the on-screen instructions to diagnose and repair any issues with the company file.
  3. Once the repair process is complete, open QuickBooks and check if Error 6000 77 is resolved.

Step 6: Restore a Backup of the Company File

  1. If you have a recent backup of the company file, restore it to a different location.
  2. Open QuickBooks and choose “Open or restore an existing company.”
  3. Browse to the location where you restored the backup file and open it.
  4. If the backup file opens successfully, it indicates that the original company file may be damaged or corrupt.

Step 7: Contact Technical Support If none of the above solutions resolve QuickBooks Error 6000 77, it is recommended to contact the official QuickBooks technical support team or consult with a certified QuickBooks professional for further assistance. They can provide more advanced troubleshooting steps tailored to your specific situation.


QuickBooks Error 6000 77 can be a frustrating obstacle when trying to access or open a company file. By following the troubleshooting steps outlined in this guide, you can effectively diagnose and resolve Error 6000 77. Copy the company file to the local hard drive, rename the .TLG and .ND files, check folder permissions, disable third-party security software, use the QuickBooks File Doctor Tool, restore a backup file, and contact technical support if needed. With these steps, you can overcome QuickBooks Error 6000 77 and regain seamless access to your company files.

Leave a Reply

Your email address will not be published.