How to Fix QuickBooks Desktop Error -6190, -816? | Unable To Open Company File

QuickBooks Desktop Error -6190, -816 is a common yet critical issue that typically appears when the software is unable to access the company file. Common triggers include mismatched transaction log files (.TLG) and company files (.QBW), accessing the file in single-user mode from multiple systems, data corruption, incomplete installations, or interference from malware or registry issues.

Before diving into solutions, you should ensure QuickBooks is updated to the latest version and that no other users are currently logged into the file. You will notice that QuickBooks crashes with an error code, system lags or freezes, and there are unusual slow responses to mouse or keyboard commands whenever you face this error. Here’s a detailed, step-by-step guide to resolving QuickBooks Error Code 6190, -816 quickly and effectively.

Solution 1: Rename the Network Data and Transaction Log Configuration Files

Renaming the .ND and .TLG files resets corrupted configuration, resolving mismatches that prevent company file access in QuickBooks. Check out these steps to rename the files and fix the error.

1. On the system that has the company file, open the company folder.
2. Find the following files:
   • company_file.qbw.nd
   • company_file.qbw.tlg
3. Rename both files:
   • Add a suffix like .old at the end of the filenames (e.g., company_file.qbw.nd.old)

Note: Do not change or delete the file extensions.

4. Close the folder and open QuickBooks.
5. Try logging into the company file again.

Solution 2: Use QuickBooks File Doctor Tool

The File Doctor Tool detects and repairs data damage or network issues that commonly trigger error 6190, -816 in QuickBooks. Here are the steps to run QuickBooks File Doctor and resolve the issue.

1. Download and Install QuickBooks File Doctor from the official Intuit website.
2. Run the tool as an administrator.
3. You’ll see two options:
   • Both File Damage and Connectivity
   • Network Connectivity Only
4. Select “Both File Damage and Connectivity” to identify and fix any damaged files.
5. Enter your admin password when prompted.
6. Specify if the company file is stored on a Workstation or Server:
   • Click “Yes” if on Server, “No” otherwise.
7. Click on “Proceed” and let the tool run.

Solution 3: Update QuickBooks and Backup Files

Outdated QuickBooks versions may conflict with current data; updating ensures compatibility and reduces error risks when accessing the company file. Follow these steps to update QuickBooks and backup your data.

1. Open QuickBooks and go to Help > Update QuickBooks Desktop.
2. Click on the Options tab and select Mark All, then hit Save.
3. Navigate to the Update Now tab.
4. Check the box for Reset Update, and click Get Updates.
5. Once the update completes, restart QuickBooks and install any available updates.
6. Reboot your system and try accessing the company file again.

Solution 4: Single User Mode Check

Using QuickBooks in single-user mode ensures no session conflicts, which are a common cause of company file access errors. Check out these steps:

1. Restart your computer.
2. Copy the company file to your desktop.
3. Then, copy it back to its original location.
4. Sign into QuickBooks using your credentials.

In case the error still appears, ensure no other user is logged in to the company file.

Solution 5: Use QuickBooks Refresher Tool

The Refresher Tool resolves minor glitches and background process errors that may block access to the company file in QuickBooks. Here are the steps to use the Refresher Tool and fix the problem.

1. Close QuickBooks on all systems.
2. Download the QBRefresher Tool from Intuit.
3. Locate and run the qbrefresherv1.exe file.
4. Click Fix my QuickBooks and wait for the tool to finish diagnosing.
5. Reopen QuickBooks and try accessing your file.

Solution 6: Update Windows

Updating Windows improves system compatibility and performance, fixing OS-level issues that may interfere with QuickBooks file access. Check out these steps to update your system and recheck QuickBooks.

1. Open the Start Menu > Settings > Update & Security.
2. Go to Windows Update and click Check for Updates.
3. After updates install, reinstall QuickBooks and check for the error again.

Solution 7: Clear Temporary Files

Removing temporary files clears system clutter that may interfere with software operations, helping QuickBooks run smoothly and error-free. Follow these steps:

1. Press Windows + R, type cleanmgr, and press Enter.

2. Select the drive where QuickBooks is installed.

3. Choose junk files to remove and click OK.

Solution 8: Repair the Windows Registry

Registry corruption may disrupt QuickBooks operations; repairing relevant entries restores functionality and eliminates error 6190, -816. Here are the steps to safely repair the registry and fix the issue.

Note: Perform with caution or under professional guidance.

1. Open the Start Menu and type command.
2. Press Ctrl + Shift + Enter to run as administrator.
3. Type regedit and press Enter.

4. Locate the registry key related to QuickBooks error 6190.
5. Click Export, save the backup with a .reg extension.

6. Follow on-screen instructions to complete the repair.

Solution 9: Install QuickBooks Database Server Manager

Installing the Database Server Manager ensures proper network hosting and multi-user access, preventing error triggers in shared environments. Check out these steps to install and configure the server manager.

1. Download and install the QuickBooks Database Server Manager on the server.
2. Open Start Menu and search for the tool.
3. Launch it and update to the latest version.
4. Restart the server and open QuickBooks on all systems.

Solution 10: Perform System Restore

System Restore reverts Windows to a stable point, undoing any changes that may have caused the QuickBooks file access error. Here are the steps to perform a restore and fix QuickBooks.

1. Click Start, search for System Restore, and press Enter.

2. Follow the on-screen prompts to restore your system to an earlier state.
3. Once complete, reopen QuickBooks and access your file.

Solution 11: Run QuickBooks in Safe Mode

Safe Mode limits third-party interference, allowing QuickBooks to run in a clean environment and revealing whether external conflicts cause the error. Follow these steps to open QuickBooks in Safe Mode.

1. Press Win + R, type msconfig, and press Enter.
2. Go to the Boot tab and select Safe Boot > Minimal.
3. Click Apply and OK, then restart your computer.
4. Once in Safe Mode, ensure QuickBooks-related services are running.
5. Try opening QuickBooks and your company file again.

Solution 12: Repair QuickBooks Installation

Repairing the QuickBooks installation fixes missing or damaged program files that may prevent proper file access and lead to errors. Check out these steps: 

1. Close QuickBooks.
2. Open Control Panel > Programs and Features > QuickBooks.

3. Click Uninstall/Change > choose Repair.
4. Follow the instructions to complete the repair.
5. Restart your system and verify if the issue is resolved.

What are the Prerequisites to Fix QuickBooks Desktop Error -6190, -816?

Here are a few requirements that you must fulfil before fixing QuickBooks Error Code 6190, -816:

• Ensure you have administrative access to your system and QuickBooks software.
• Backup your QuickBooks company file and transaction log file before making any changes.
• Confirm that QuickBooks is updated to the latest version to avoid compatibility issues.
• Verify that no other users are logged in, especially in single-user mode.
• Make sure your internet connection is stable if accessing QuickBooks files on a network.
• Check for and eliminate malware or virus infections that may damage your company files.

How to Identify QuickBooks Desktop Error Codes -6190, -816?

Here’s how you can identify QuickBooks Error 6190, -816:

• The error message: “QuickBooks is unable to open this company file. It may be opened by another user. You should ask that user to switch to multimedia mode so you can both use the company file at the same time. The file could also be located in a read-only network folder. If it is, ask your system administrator to make the file accessible” is displayed when users encounter QuickBooks Error Codes (-6190, -816).
• QuickBooks or the system may freeze or crash during operation.
• Keyboard and mouse responses become unusually slow, indicating lag.
• You may notice frequent system hangs or unresponsive behavior while accessing the file.
• The system may display Error Codes -6190 and -816 specifically during login.

How to Prevent QuickBooks Error 6190, -816?

To avoid facing this error in the future, follow the tips given below:

• Always log out properly from QuickBooks to prevent session issues.
• Avoid accessing the company file on different systems without syncing the .TLG file.
• Regularly update QuickBooks and Windows OS to prevent file conflicts.
• Use multi-user mode carefully, ensuring proper user permissions.

When Should You Seek Professional Help for QuickBooks Desktop Error -6190, -816?

You should consider seeking professional help for QuickBooks Desktop Error -6190, -816 when repeated troubleshooting efforts fail to resolve the issue or when data integrity is at risk. Experiencing frequent system crashes, persistent file mismatches, or complex network-related errors may indicate deeper technical problems.