# Guide to Troubleshoot QuickBooks Error -6190, -816
QuickBooks Error -6190, -816 typically arises when QuickBooks Desktop is unable to open a company file. This error often occurs in multi-user environments due to discrepancies between the transaction log file (.TLG) and the company file (.QBW), or when another user is logged into the company file in single-user mode. Network issues can also contribute to this error.
Understanding QuickBooks Error -6190, -816
Common Causes:
Single-User Mode Conflict: Another user is logged into the company file in single-user mode.
Transaction Log Mismatch: The transaction log file (.TLG) doesn't match the company file (.QBW).
Network Issues: Problems with the multi-user network setup.
File Corruption: Corrupted company file or network data files.
Step-by-Step Solutions
1. Update QuickBooks Desktop
Ensuring that QuickBooks is updated can resolve compatibility issues and known bugs.
Open QuickBooks Desktop.
Navigate to Help > Update QuickBooks Desktop.
Click on Update Now, then select Get Updates.
Restart QuickBooks after the update completes.
2. Use QuickBooks Tool Hub
QuickBooks Tool Hub offers tools to fix common issues.
Download the latest version of QuickBooks Tool Hub.
Install and open the Tool Hub.
Select Program Problems and then Quick Fix my Program.
After the tool runs, open QuickBooks and the company file.
3. Rename .ND and .TLG Files
Renaming these files allows QuickBooks to recreate them, potentially resolving the issue.
Navigate to the folder containing your company file.
Locate files with the same name as your company file but with extensions .ND and .TLG.
Right-click each file and select Rename.
Add .OLD at the end of each file name (e.g., company_file.qbw.nd.OLD).
Open QuickBooks and try accessing the company file.
4. Restart All Computers
Sometimes, a simple restart can resolve network-related issues.
Restart the server hosting the company file.
Restart all workstations connected to the network.
Open QuickBooks on the server and then on each workstation.
5. Run QuickBooks Database Server Manager
This tool helps manage your QuickBooks Database Server.
Open QuickBooks Tool Hub.
Select Network Issues and then QuickBooks Database Server Manager.
Scan the folder containing your company file.
After the scan, open QuickBooks and try accessing the company file.
6. Verify Hosting Settings
Ensure that only the server computer is set to host multi-user access.
Open QuickBooks on each workstation.
Go to File > Utilities.
If you see Host Multi-User Access, do not select it.
If you see Stop Hosting Multi-User Access, select it.
7. Move Company File to Local Drive
If your company file is stored on an external drive or cloud service, move it to a local drive.
Copy the company file to a local drive on the server.
Open QuickBooks and access the company file from the new location.
8. Restore a Backup
If the company file is corrupted, restoring a recent backup may resolve the issue.
Open QuickBooks.
Go to File > Open or Restore Company > Restore a backup copy.
Follow the prompts to restore the backup.
Need Further Assistance?
If you've tried the above solutions and still encounter Error -6190, -816, our QuickBooks support team is here to help. Contact us at 877-200-7013 for personalized assistance.
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