How to Fix QuickBooks Desktop Error Code 6189 and -816 (Company File in Use)

Are you seeing QuickBooks Desktop Error Code 6189, -816 when trying to open your company file? This is a common but frustrating issue that can prevent you from accessing your financial data at a critical time. Don’t worry—this guide breaks down why the error appears, how to recognize it, and provides simple, actionable solutions so you can get back to work quickly and with confidence.

What Is QuickBooks Error 6189, -816?

QuickBooks Error 6189, -816 typically shows up when you try to open your company file in a multi-user setup. You’ll likely see an error message such as:

“QuickBooks is unable to open this company file. It may have been opened by another user.”

This error mostly affects users with networked computers sharing company files across multiple locations.

Who Should Read This?

• Small business owners using QuickBooks Desktop
• Bookkeepers and accountants
• IT staff managing networked QuickBooks installations

Why Does QuickBooks Error 6189, -816 Matter?

This error can:

• Block access to your essential accounting data
• Disrupt payroll, invoicing, or reporting workflows
• Cause lost time, productivity hassles, and unwanted stress

Fixing this error quickly can minimize downtime and ensure your business continues running smoothly.

Main Causes of Error 6189, -816

• Company file is already open on another workstation
• Insufficient permissions on the folder containing the .QBW and .TLG files
• Network data file (.ND) or transaction log file (.TLG) is corrupted or mismatched
• Hosting not properly set up on your network
• Company file is being used in multi-user mode, but the Database Server Manager isn’t configured correctly
• QuickBooks Desktop or Windows user profile is not updated

Common Signs and Symptoms

Are you wondering if you are affected? Check for these signs:

• QuickBooks will not open the company file and displays Error 6189, -816
• You experience crashes or freezing only when accessing your file over the network
• The error only shows up when more than one user tries to open the company file

Preparation Before Troubleshooting

Before you begin:

• Confirm that all users have logged out of QuickBooks Desktop
• Make a backup of your company file
• Make sure QuickBooks Desktop is up-to-date
• Double-check your admin rights on Windows and QuickBooks

Step-by-Step Solutions to Fix Error 6189, -816

Here’s how we plan to fix this problem, step by step, with solutions that focus on the most common causes:

1. Use QuickBooks Tool Hub

• Close QuickBooks Desktop
• Download the latest QuickBooks Tool Hub from Intuit’s official site
• Open the Tool Hub and click Company File Issues
• Select Quick Fix my File
• Try opening your company file again

2. Check User Permissions

• Right-click the folder storing your .QBW and .TLG files
• Go to Properties > Security
• Choose your Windows user and make sure Full Control is enabled

3. Verify Multi-User Hosting Setup

• Open QuickBooks on the host/server computer
• Navigate to File > Utilities
• If you see Host Multi-User Access, select it.
• If you see Stop Hosting Multi-User Access, don’t click it—your hosting is already on.

4. Rename .ND and .TLG Files

• Open the folder with your company file
• Locate the files named [YourCompanyFile].qbw.nd and [YourCompanyFile].qbw.tlg
• Right-click each and add .old to the file name (e.g., CompanyFile.qbw.nd.old)
• Reopen QuickBooks; it will recreate these files automatically

5. Move the File to Local Storage (If Using Removable Media)

• If your company file is on an external or network drive, move it to your local hard drive
• Try opening the file locally to see if the error persists

6. Restart All Workstations and Server

• Power down all computers that use QuickBooks, including the server
• Restart each one and try accessing the file again

Special Cases and Broader Scenarios

• Error on QuickBooks for Mac or Online: This specific code is for QuickBooks Desktop on Windows; Mac/Online versions show other messages.
• Complex Network Setups: Only your server should host files; workstations should connect through Database Server Manager.

Preventative Tips

• Schedule regular backups of your company file (local and cloud)
• Regularly run QuickBooks File Doctor for preventive checks
• Update QuickBooks Desktop frequently
• Educate users: Only allow one user to open the file directly on the server. Others should access it through QuickBooks, not by browsing the file location.

Quick Tutorial: Running QuickBooks Tool Hub

1. Download from the official Intuit website
2. Install and open the Tool Hub
3. Select Company File Issues
4. Click Run QuickBooks File Doctor
5. Select your company file, click Continue, and follow prompts

Frequently Asked Questions

Q1: What does QuickBooks Error 6189 -816 mean? Most of the time, this error means that QuickBooks can not get to your company file. It usually means that the file is corrupted, that there are problems with network access, or that another process is locking the file.

Q2: Can I prevent Error 6189 -816 from happening again? Of course. We suggest that you back up your company file regularly, make sure your network is set up correctly, always close QuickBooks properly, and make sure that all users have the right permissions to access the company file folder. We also said that keeping QuickBooks up to date is helpful.

Q3: Is the QuickBooks File Doctor the best tool for this error? Yes, the QuickBooks File Doctor is an excellent tool and often resolves this error, especially if it’s related to basic network access or minor file corruption.

Q4: What if I can’t find the .ND and .TLG files? .ND and .TLG filesshould be in the same folder as your main QuickBooks company file (.QBW). If you can’t see them, your computer might be hiding file extensions. You can usually change folder options in Windows to show all file extensions.

Q5: Will renaming .ND and .TLG files hurt my data? No, it won’t hurt your actual company data. These are configuration and log files. When you rename them, QuickBooks will create new ones the next time you open the company file.

Q6: What if my company file is on a server? If your company file is on a server, many of these steps (like checking permissions and closing processes) need to be done on the server itself.

Still need help?
Don’t let QuickBooks errors disrupt your business. For fast, friendly support—call our QuickBooks specialists at 888-368-8874 or visit our blog at qbdatarepair. We have more advanced tools and insights that might be needed for particularly stubborn cases.Your business peace-of-mind is just a call away.