How to Fix Error Code 6073 and 99001 in QuickBooks When Open Company File?

How to Fix Error Code 6073 and 99001 in QuickBooks When Opening a Company File Opening your QuickBooks company file should be a simple process, but sometimes users encounter Error Code 6073 and 99001, preventing access to critical financial data. This error usually occurs when the company file is already open in another mode, stored on a network with incorrect permissions, or hosted improperly. As a result, users may be unable to access invoices, payroll, or financial reports. If you're unable to resolve the issue on your own, you can call 1-866-513-4656 for professional guidance.

If you're unable to resolve the issue on your own, you can call 1-866-513-4656 for professional guidance.

This guide explains the causes of QuickBooks Error Code 6073 and 99001 and provides step-by-step solutions to restore access to your company file.
What Is QuickBooks Error Code 6073 and 99001?QuickBooks Error 6073, 99001 typically appears when QuickBooks cannot open the company file because it is being used incorrectly on the network or another user has locked the file.
You may see an error message such as:

Error Code: (-6073, -99001): QuickBooks is unable to open this company file.

Symptoms of Error 6073 and 99001Common signs include:

• Company file won't open
• QuickBooks freezes while loading the file
• Multi-user mode fails
• Error message appears repeatedly
• Slow network performance
• Unable to switch to multi-user mode

Causes of QuickBooks Error 6073 and 990011. Company File Is Open on Another Computer If another user has opened the company file in Single-user Mode, additional users cannot access it.
2. Incorrect Hosting Configuration More than one computer may be hosting the company file simultaneously.
3. Damaged Network Data (.ND) File A corrupted Network Data file can prevent QuickBooks from locating the company file correctly.
4. Company File Stored in Read-Only Mode If the folder permissions are incorrect, QuickBooks may not have permission to access the file.
5. Remote Access Session Still Active A disconnected Remote Desktop session may still have the company file open.
6. Firewall or Security Restrictions Security software may block QuickBooks communication over the network.
How to Fix QuickBooks Error Code 6073 and 99001Follow these solutions in order.
Solution 1: Close the Company File on All Computers Ensure every workstation has exited QuickBooks completely.
If someone is using Remote Desktop:

• Log out completely
• Close QuickBooks
• Restart the workstation if necessary

Try opening the company file again.
Solution 2: Open the Company File Directly Menu Path File > Open or Restore Company > Open a Company File
Browse to the company file and attempt to open it directly.
Solution 3: Verify Hosting Settings Hosting should only be enabled on the server.
Menu Path File > Utilities
Check whether you see:

• Host Multi-User Access (hosting is OFF)
• Stop Hosting Multi-User Access (hosting is ON)

Disable hosting on workstations and leave it enabled only on the server.
Solution 4: Rename the Network Data File QuickBooks automatically recreates this file.
Steps:

1. Close QuickBooks.
2. Open the company file folder.
3. Locate the file ending in .ND.
4. Rename it by adding .OLD.

Example:
CompanyFile.qbw.nd
becomes
CompanyFile.qbw.nd.old
Reopen QuickBooks and access the company file.
Solution 5: Run QuickBooks File Doctor QuickBooks Tool Hub includes File Doctor to repair company file and network problems.
Steps

1. Close QuickBooks.
2. Open QuickBooks Tool Hub.
3. Select Company File Issues.
4. Click Run QuickBooks File Doctor.
5. Choose your company file.
6. Allow the scan to complete.

Solution 6: Verify Folder Permissions Ensure all authorized users have:

• Read permission
• Write permission
• Modify permission

Incorrect folder permissions often prevent QuickBooks from accessing shared company files.
Solution 7: Restart QuickBooks Database Server Manager Restarting the Database Server Manager refreshes network communication.
After restarting the service:

• Rescan company folders.
• Retry opening the company file.

Solution 8: Copy the Company File to a Local Drive Copy the company file temporarily to your local desktop.
If it opens successfully, the problem likely involves:

• Network configuration
• Shared folder permissions
• Server connectivity

Solution 9: Restart the Server Sometimes the server still maintains an active lock on the company file.
Restart:

• File server
• Workstations
• QuickBooks Database Server

Then reopen QuickBooks.
Solution 10: Contact the Online Phone Team If QuickBooks continues displaying Error Code 6073 and 99001, advanced company file repair may be required. Call 1-866-513-4656 for further troubleshooting.
Prevention Tips

✔ Keep QuickBooks updated.

✔ Store company files in a shared network folder.
✔ Enable hosting only on the server.
✔ Close QuickBooks properly before shutting down.
✔ Back up company files daily.
✔ Avoid force-closing QuickBooks.
✔ Scan company folders regularly using Database Server Manager.
✔ Verify Windows folder permissions after server updates.
Frequently Asked Questions1. What causes QuickBooks Error 6073 and 99001?The error usually occurs because the company file is already open elsewhere, hosting is configured incorrectly, or network permissions prevent QuickBooks from accessing the file.
2. Can File Doctor fix Error 6073 and 99001?Yes. QuickBooks File Doctor can repair many company file and network-related issues associated with this error.
3. Why does QuickBooks say the company file cannot be opened? QuickBooks may detect that another user has the file open in Single-user Mode, the network configuration is incorrect, or the company file is locked.
4. Should hosting be enabled on every computer? No. Hosting should only be enabled on the server where the company file is stored.
5. Will renaming the .ND file delete my data? No. The .ND file stores network configuration information. Renaming it does not affect your company data, and QuickBooks creates a new one automatically.
6. What should I do if the error still appears? If you've verified hosting, repaired the network configuration, and run File Doctor but the error persists, call 1-866-513-4656 for advanced troubleshooting.
Final Thoughts QuickBooks Error Code 6073 and 99001 typically indicates that QuickBooks cannot access your company file because of hosting conflicts, network issues, locked files, or permission problems. In most cases, verifying hosting settings, running QuickBooks File Doctor, renaming the .ND file, and checking folder permissions will restore access to the company file. Following the preventive practices in this guide can also reduce the likelihood of encountering this error in the future. If you continue experiencing problems opening your company file, call 1-866-513-4656 for professional assistance.