Understanding and Resolving QuickBooks Error 6073: A Comprehensive Guide

QuickBooks, a widely used accounting software by Intuit, streamlines financial management for small to medium-sized businesses. Despite its robust functionality, users occasionally encounter errors that can disrupt their workflow. One such error is QuickBooks Error 6073, which typically occurs when trying to open a company file. In this comprehensive guide, we will explore the causes of QuickBooks Error 6073, provide detailed, step-by-step solutions to fix it, and discuss preventive measures to avoid this error in the future. Read More :-  QuickBooks Error 7300

What is QuickBooks Error 6073?

QuickBooks Error 6073 usually manifests when a user attempts to open a company file in multi-user mode. The error message often reads:
  • “Error 6073, -99001: QuickBooks is unable to open this company file. It may have been opened by another user. You should ask that user to switch to multi-user mode so you can both use the company file at the same time.”
This error indicates a conflict in accessing the company file, typically due to file permission issues or conflicting user sessions.

Common Causes of QuickBooks Error 6073

Understanding the underlying causes of QuickBooks Error 6073 can help in diagnosing and resolving the issue effectively. Here are some typical reasons for this error:
  1. File Being Opened in Single-User Mode:
    • Another user may have opened the company file in single-user mode, preventing access in multi-user mode.
  2. File Accessed from Multiple Locations:
    • The company file may be accessed from a remote location or via a network, leading to access conflicts.
  3. Incompatible Operating System Settings:
    • Differences in operating system settings or configurations between the server and client systems can cause this error.
  4. Corrupted Network Data (.ND) File:
    • The .ND file, which helps QuickBooks in multi-user mode, might be corrupted.
  5. Damaged Company File:
    • The company file itself may be damaged or corrupted.
  6. Folder Permissions Issues:
    • Incorrect folder permissions where the company file is stored can restrict access.

Step-by-Step Solutions to Fix QuickBooks Error 6073

Now that we have identified the common causes ofm windows 11 QuickBooks Error 6073, let’s explore step-by-step solutions to resolve this error. Follow these methods to troubleshoot and fix the issue.

Solution 1: Verify and Switch User Mode

Ensure that the company file is not open in single-user mode by another user.
  1. Check User Mode:
    • Ensure that no other user has opened the company file in single-user mode.
  2. Switch to Multi-User Mode:
    • Open QuickBooks on the host computer.
    • Go to File > Switch to Multi-User Mode.
  3. Retry Accessing the Company File:
    • Try opening the company file from the client workstation.

Solution 2: Rename .ND and .TLG Files

Renaming the .ND and .TLG files can help resolve issues related to network data and transaction logs.
  1. Open File Location:
    • Navigate to the folder where your company file is stored.
  2. Rename .ND and .TLG Files:
    • Locate the .ND and .TLG files with the same name as your company file (e.g., YourCompanyFile.qbw.nd and YourCompanyFile.qbw.tlg).
    • Right-click each file and select Rename, adding .old to the end of each file name (e.g., YourCompanyFile.qbw.nd.old).
  3. Open QuickBooks and Company File:
    • Open QuickBooks and attempt to open the company file again. New .ND and .TLG files will be created automatically.

Solution 3: Use QuickBooks File Doctor

QuickBooks File Doctor is a tool designed to diagnose and repair file and network issues.
  1. Download QuickBooks Tool Hub:
    • Visit the Intuit website and download QuickBooks Tool Hub.
  2. Install QuickBooks Tool Hub:
    • Follow the on-screen instructions to install QuickBooks Tool Hub.
  3. Run QuickBooks File Doctor:
    • Open QuickBooks Tool Hub and select the Company File Issues tab.
    • Click on Run QuickBooks File Doctor and follow the prompts to select your company file and run the scan.
  4. Retry Opening the Company File:
    • After the tool completes, try opening your company file again.

Solution 4: Check and Set Folder Permissions

Ensuring that the folder containing the company file has the correct permissions is crucial.
  1. Navigate to the Company File Folder:
    • Locate the folder where your company file is stored.
  2. Check Folder Permissions:
    • Right-click the folder and select Properties.
    • Go to the Security tab and ensure that all users have Full Control.
  3. Modify Permissions if Needed:
    • If the permissions are incorrect, click Edit and modify the permissions to grant Full Control to all users.
  4. Retry Opening the Company File:
    • Attempt to open the company file from the client workstation again.

Solution 5: Configure Firewall and Security Settings

Firewalls and security software can sometimes block QuickBooks processes, leading to access issues.
  1. Check Firewall Settings:
    • Ensure that QuickBooks is allowed through the firewall on both the server and client computers.
  2. Add QuickBooks as an Exception:
    • Go to Control Panel > System and Security > Windows Defender Firewall.
    • Click Allow an app or feature through Windows Defender Firewall and add QuickBooks as an exception.
  3. Disable Antivirus Temporarily:
    • Temporarily disable your antivirus software to see if it resolves the issue. Remember to re-enable it after troubleshooting.
  4. Retry Opening the Company File:
    • Try opening the company file again after configuring the firewall and security settings.

Solution 6: Repair QuickBooks Installation

Read More :-    QuickBooks Error 7500 Repairing the QuickBooks installation can fix issues caused by corrupted or incomplete installations.
  1. Open Control Panel:
    • Go to Control Panel > Programs > Programs and Features.
  2. Select QuickBooks:
    • Find QuickBooks in the list of programs and click Uninstall/Change.
  3. Choose Repair Option:
    • In the QuickBooks installation window, select Repair.
    • Follow the on-screen instructions to complete the repair process.
  4. Retry Opening the Company File:
    • After the repair process completes, try opening the company file again.

Solution 7: Restart QuickBooks Database Server Manager

Restarting the QuickBooks Database Server Manager can help resolve network-related issues.
  1. Open QuickBooks Database Server Manager:
    • Go to Start > Programs > QuickBooks > QuickBooks Database Server Manager.
  2. Restart the Service:
    • Click Scan Folders and then Browse to select the folder containing your company file.
    • Click Scan and wait for the process to complete.
    • Restart the Database Server Manager service.
  3. Retry Opening the Company File:
    • Try accessing the company file from the client workstation again.

Solution 8: Use QuickBooks Auto Data Recovery

If the company file is damaged, using QuickBooks Auto Data Recovery (ADR) can help recover your data.
  1. Locate ADR Folder:
    • Navigate to the folder containing your QuickBooks company file.
  2. Copy ADR Files:
    • Locate the .ADR file and the .QBW file. Copy both files to a new folder.
  3. Rename ADR File:
    • Rename the .ADR file to .QBW (e.g., YourCompanyFile.qbw.adr to YourCompanyFile.qbw).
  4. Open QuickBooks:
    • Open QuickBooks and attempt to open the recovered company file.

Preventive Measures to Avoid QuickBooks Error 6073

Taking preventive measures can help you avoid encountering QuickBooks Error 6073 in the future. Here are some best practices:

Regular Updates

  • Update QuickBooks:
    • Regularly update QuickBooks to the latest version to benefit from bug fixes and new features.
  • Update Windows:
    • Keep your Windows operating system up to date to ensure compatibility with QuickBooks.

Data Maintenance

  • Verify and Rebuild Data:
    • Regularly use the Verify and Rebuild Data utilities to maintain the integrity of your QuickBooks data file.
  • Backup Data:
    • Regularly back up your QuickBooks data to prevent data loss in case of crashes.

System Optimization

  • Optimize System Performance:
    • Regularly check your system for performance issues and address them promptly.
  • Increase Virtual Memory:
    • Ensure that your system has adequate virtual memory to run QuickBooks smoothly.

Security and Permissions

  • Configure Security Settings:
    • Ensure that your firewall and antivirus settings do not block QuickBooks processes.
  • Manage User Permissions:
    • Provide appropriate permissions to QuickBooks users to prevent access-related crashes.

Training and Support

  • User Training:
    • Train QuickBooks users to minimize errors caused by improper usage.
  • Professional Support:
    • Seek professional support if you encounter persistent issues with QuickBooks.


QuickBooks Error 6073 can be a significant hindrance to your business operations, but with the right approach, it is possible to diagnose and fix the problem. By following the solutions outlined in this guide, you can address the root causes of QuickBooks Error 6073 and implement preventive measures to maintain a stable and efficient accounting system. Regular maintenance and updates are key to ensuring that QuickBooks runs smoothly, allowing you to focus on what matters most – managing your business. If you continue to experience issues, don’t hesitate to seek professional assistance to safeguard your financial data and operations. Read More :-    QuickBooks Error 40003
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