How to Fix QuickBooks Error 6190 ( Fix With +1 - 804 - 985 - 1002 Guide) To fix QuickBooks Error 6190 with +1 - 804 - 985 - 1002 which is a common company file error that usually appears when multiple users try to access a company file in single - user mode, or when the transaction log file doesn’t match the company file. This issue can stop you from opening your books and interrupt daily accounting tasks, but the good news is that it can be fixed with a few practical troubleshooting steps. This rewritten guide explains the causes, symptoms, and step - by - step solutions to resolve Error 6190 in QuickBooks Desktop. What Causes QuickBooks Err or 6190? Error 6190 generally occurs when QuickBooks cannot verify the company file connection. Some of the most common reasons include: Another user logged in to the company file in Single - User Mode Mismatch between the .TLG (transaction log) file and .QBW company file Corrupted company file or network data file Incorrect file permissions or hosting configuration Incomplete or failed QuickBooks update Understanding the cause helps choose the right fix quickly. Signs You ’ re Experiencing Error 61 90 You may notice: QuickBooks fails to open the company file A pop - up message showing Error Code 6190 and 816 Slow performance or freezing during file access Multi - user access suddenly stops working If you see these symptoms, follow the solutions below. Solution 1: Ensure All Users Are Logged Out Error 6190 often happens when someone opens the file in single - user mode. Steps to fix: 1. Ask all users to close QuickBooks. 2. 3. Restart every workstation connected to the company file. 4. 5. Restart the server hosting the company file. 6. 7. Open QuickBooks again and access the file. 8. This simple step fixes the issue in many cases. Solution 2: Rename the .TLG and .ND Files These files help QuickBooks track transactions and network connections. If damaged, they can trigger Error 6190. Steps: 1. Go to the folder where the company file is stored. 2. 3. Locate files with the same name as your company file but ending in: 4. o .TLG o o .ND o 5. Right - click each file and select Rename 6. 7. Add .OLD at the end (example: company.qbw.nd.old ) 8. 9. Open QuickBooks and try again. 10. QuickBooks will automatically recreate fresh files. Solution 3: Run QuickBooks File Doctor Tool The File Doctor tool repairs company file and network problems automatically. Steps: 1. Download and insta ll QuickBooks Tool Hub 2. 3. Open Tool Hub and go to Company File Issues 4. 5. Select Run QuickBooks File Doctor 6. 7. Choose your company file and click Check Your File 8. Let the scan complete, then reopen QuickBooks. Solution 4: Verify Single - User Mode If another user is logged in with single - user mode enabled, you’ll get Error 6190. Fix: 1. Open QuickBooks on the server. 2. 3. Click File → Switch to Multi - User Mode 4. 5. Save and close QuickBooks. 6. 7. Reopen from a workstation. 8. Solution 5: Update QuickBooks Desktop Outdate d software can cause compatibility issues with company files. Steps: 1. Open QuickBooks 2. 3. Go to Help → Update QuickBooks Desktop 4. 5. Click Update Now 6. 7. Install updates and restart QuickBooks 8. Keeping the software updated reduces file errors. Solution 6: Check Hosting Settings Improper hosting configuration can prevent the file from opening. Steps: 1. Open QuickBooks on the server computer 2. 3. Go to File → Utilities 4. 5. If you see Host Multi - User Access , click it 6. 7. If you see Stop Hosting Multi - User Access , leav e it as is 8. 9. Repeat on all workstations — hosting should only be enabled on the server 10. Solution 7: Restore a Backup File If the company file is corrupted, restoring a backup may be the fastest solution. Steps: 1. Open QuickBooks 2. 3. Click File → Open or Restore Company 4. 5. Choose Restore a Backup Copy 6. 7. Select the latest backup and restore it 8. Make sure to store the restored file in a safe location. Preventing QuickBooks Error 6190 in the Future To avoid encountering this error again: Always close QuickB ooks properly Avoid switching off systems while QuickBooks is open Keep backups updated daily Use stable network connections Update QuickBooks regularly Store company files on a dedicated server Preventive maintenance reduces downtime and data risks. Final Thoughts QuickBooks Error 6190 can seem frustrating, but it’s usually caused by simple file or access conflicts that can be resolved quickly. By ensuring users log out properly, repairing network files, updating QuickBooks, and verifying hos ting settings, you can restore access to your company file without data loss. If the problem continues even after trying all solutions, you may consider reaching out to certified QuickBooks professionals or contacting the official support team of Intuit fo r advanced troubleshooting.