If you are getting an error message, “An error occurred when QuickBooks tried to access the company file (-6189, -816),” then this indicates that the hosting is not correctly set up in your network. Fortunately, this error is just related to the program set-up and corruption in the program installation, and the company file does not get affected by it. If you are also dealing with the same error and need help resolving it, follow the troubleshooting solutions listed in this article for quick relief.
If you are experiencing QuickBooks error 6189 816 and want to fix it right away, then get assistance from certified QuickBooks professionals by giving a call at our customer support number (+1 800-579-9430)
Top reasons causing QuickBooks error 6189 816
Here are some possible causes behind the error:
Partial or corrupt installation of QuickBooks.
Damaged or missing QuickBooks transaction files.
The file is logged in by another user in single-user mode.
Now, proceed to the troubleshooting procedure given below to fix the error.
Fixing QuickBooks error 6189 816 with Trusted Methods
Perform the troubleshooting methods given below to fix the error:
Method 1. Use Quick Fix my Program
The tool will run a quick repair and shut down all background processes that QuickBooks uses. 
Download and install QuickBooks Tool Hub that will be required to run Quick Fix My Program Tool.
Once the Tool Hub is installed, run it and move to the Program Installation issues tab.
Select Quick Fix My Program Tool and let it repair the issues with the program installation.
Try to access the company file once again and check if the error is now resolved.
You may also read QuickBooks Error 6177
Method 2: Re-create Missing or Damaged Transaction Log File
Go to the QuickBooks installation folder, where the company file is saved.
Now locate and right-click the file having the same name as your company file but with .TLG extension.
Select Rename option and add .XYZ at the end of the file name.
Save the changes and try to access the company file once again.
Method 3: Ask other Users to Logout from the Company File
Ask all other users to log out from the company file and make sure no one is running QuickBooks in multi-user mode. If you have a server where the company file is saved, multi-user mode needs to be enabled that too on the server. 
If even after using all the troubleshooting solutions listed above, you are still getting QuickBooks Error 6189 816 , then you will need to consult a certified QuickBooks expert for advanced troubleshooting help and live technical assistance. You can reach one of the experts from the QuickBooks support team by dialing QuickBooks support number +1 800-579-9430.

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