How to Fix QuickBooks Error 6073 99001 (Unable to Open the Company File)?

QuickBooks Error 6073 99001 occurs when users try to open a company file, but QuickBooks cannot access it due to file restrictions, multi-user conflicts, or network issues. This error affects all QuickBooks versions, including Desktop (Pro, Premier, Enterprise), Online, and Point of Sale (POS). It happens when the file is open in single-user mode on another computer, stored on a read-only network drive, or accessed remotely.

To fix this issue, users should check hosting settings, file permissions, .ND and .TLG files, and network configurations. Using QuickBooks File Doctor and ensuring multi-user mode settings are correct can also help. Preventing this error requires proper file handling, controlled access, and regular system maintenance. Here are the top solutions to fix QuickBooks Error 6073 99001.

Solution 1: Download and Run the QuickBooks File Doctor

QuickBooks File Doctor helps resolve company file errors and network problems. Follow these steps to use it:

1. Download the latest QuickBooks Tool Hub version and save the file in an accessible location.
2. Open the downloaded file.
3. Follow the on-screen instructions to install the tool and accept the terms.
4. Double-click the Windows icon to open QuickBooks Tool Hub.
5. Select Company File Issues from the tool hub menu.
6. Click Run QuickBooks File Doctor or open it manually.
7. Choose the company file from the dropdown or browse for it.
8. Select Check Your File and click Continue.
9. Enter the administrator password and click Next.

Solution 2: Manually Fix Error 6073, 99001

Try these manual methods, If QuickBooks File Doctor does not resolve the issue.

Step 1: Close Single-User Mode on Another Workstation

If another user has opened the company file in single-user mode, follow these steps:

1. Close QuickBooks Desktop on all computers.
2. Open the Company File on the Host computer.
3. Click the File menu and select Switch to Multi-User Mode.
4. If the issue continues, restart all workstations.

Step 2: Close Single-User Mode on the Host Device

1. Open QuickBooks on the host device.
2. Click the File menu and select Close Company.
3. Reopen QuickBooks.
4. Go to the File menu and select Open or Restore Company.
5. Choose Open a Company File, then click Next.
6. Select your Company File.
7. Choose Open in Multi-User Mode, then click Open.

Step 3: Change Read-Only Settings for the Company File

1. Open the host computer where the company file is stored.
2. Locate and open the folder containing the company file.
3. Right-click the folder and select Properties.
4. Go to the Security tab.
5. Select the user experiencing login issues.
6. Click Edit.
7. Check the Allow box for Full Control.
8. Click Apply, then OK to save changes.

Step 4: Fix Remote Access Issues

1. Right-click the Taskbar and select Task Manager.
2. Go to the Processes tab.
3. Look for any processes running under the affected user’s name.
4. If you find such a process, restart the computer.

Solution 3: Rename the Corrupted or Unavailable Network Data File

Follow these steps to rename the corrupted or unavailable Network Data file and restore QuickBooks functionality

1. Open Windows Explorer.
2. Locate the folder containing the QuickBooks company file.
3. Right-click the Network Data (.ND) file associated with the company file.
4. Rename the file by adding .old at the end, then press Enter.
5. Open QuickBooks and access the company file.
6. QuickBooks will automatically create a new Network Data (.ND) file.

Solution 4: Unhide the network data files and transaction log

Use these steps to unhide the Network Data and Transaction Log files for proper QuickBooks access.

1. Open My Computer.
2. Click the Tools menu and select Folder Options.
3. Go to the View tab and select Show Hidden Files and Folders.
4. Open the data folder to locate the Network Data (.ND) file and Transaction Log (.TLG) file.
5. Right-click the .ND file and select Properties.
6. Uncheck the Hidden option.
7. Click OK to save changes.

Solution 5: Restart QuickBooks Database Server Manager

QuickBooks errors -6073 and -99001 may occur due to incorrect Database Server Manager settings. Restarting the service can resolve the issue.

1. Press Windows + R, type services.msc, and press Enter.
2. In the Services window, find QuickBooksDBXX and double-click it.
3. In the Properties window:
   • Set Startup Type to Automatic.
   • Ensure Service Status is Running/Started.
4. Click the Recovery tab and adjust these settings:
   • First failure: Restart the service.
   • Second failure: Restart the service.
   • Subsequent failures: Restart the service.
5. Click OK to save changes.

Solution 6: Check and Fix Network Issues

Network issues can cause QuickBooks errors 6073 and 99001. Adjust your internet settings to fix this issue.

1. Open QuickBooks Desktop.
2. Click Help > Internet Connection Setup.
3. Select Use my computer’s Internet connection settings, then click Next.
4. Click Advanced Connection Settings and follow these steps:
   • In the Internet Options window, go to the Advanced tab.
   • Under Settings, uncheck Do not save encrypted pages to disk.
   • Check TLS 1.2.
   • Click OK to close the window.
5. In the Security tab, check if Intuit’s website is listed under Trusted Sites. If not, add it.
6. Click Apply, then OK to save changes.

Solution 7: Repair the Company File

A damaged company file can cause errors 6073 and 99001. Use QuickBooks Tool Hub to fix it.

1. Open QuickBooks Tool Hub. If unavailable, download it.
2. Click Company File Issues.
3. Select Quick Fix My File and wait for the process to complete.
4. If the issue remains, click Run QuickBooks File Doctor.
5. Choose the Company File or browse for it.
6. Select Check Your File and click Continue.
7. Enter the Admin Password and click Next.
8. Wait for the repair to finish, then open QuickBooks.

What are the Prerequisites to Fix QuickBooks Desktop Error 6073 99001?

• Install updates to avoid compatibility issues.
• Log in as an administrator to change file settings.
• Close the company file if it is open elsewhere in single-user mode.
• Check the network connection if the file is on a server.
• Close remote access tools like TeamViewer or LogMeIn.
• Ensure the company file has read/write access.
• Use QuickBooks Tool Hub and File Doctor to fix file issues.

How to Identify QuickBooks Desktop Error 6073 99001?

• A pop-up appears, stating, “QuickBooks is unable to open this company file. Error Codes: 6073, 99001.”
• QuickBooks cannot access the file in multi-user mode.
• The file is read-only on a network drive.
• Another system has the file open in single-user mode.
• The error appears when using remote desktop software.
• Restricted permissions block file access.
• Damaged network files cause errors.

How to Prevent QuickBooks Error 6073 99001?

• Switch to multi-user mode when needed.
• Don’t use single-user mode if multiple users need access.
• Grant read/write access to authorized users.
• Close TeamViewer, LogMeIn, or similar tools before use.
• Avoid saving files in read-only locations.
• Update software and network drivers.
• Scan and fix file issues early.
• Use only one system as the file host.

When Should You Seek Professional Help for QuickBooks Error 6073 99001?

Seek professional help if basic troubleshooting fails, the company file remains inaccessible, or errors persist despite fixes. Contact technical team for severe file corruption, network issues, or multi-user mode conflicts. If firewall settings, file permissions, or hosting configurations are too complex to resolve, an expert can ensure proper setup and prevent data loss. If QuickBooks File Doctor cannot fix the issue or the error keeps recurring, a certified QuickBooks professional can provide a permanent solution.

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