Hi there, @BryGuy1023.

I'm here to help you get past the error message you receive in QuickBooks Desktop (QBDT).

Error codes -6190 and -816 occur when another user is logged in to the company file in single-user mode. And there are several solutions we can try to resolve this. 

To start, let's ensure that your QuickBooks Desktop release is up-to-date to fix common issues with your file. Then, disable multi-user access. 

Here's how:

1. Access your QuickBooks company file as the Admin.
2. Go to the File menu, then select Utilities.
3. If Stop Hosting Multi-User Access is listed, choose to Stop Hosting Multi-User Access.

Once done, create a backup copy of your company file. Then, download and install QuickBooks Tools Hub, then run the Quick Fix my Program. It's a built-in tool that automatically detects and fixes data damage issues within QuickBooks.

1. Download the most recent version (1.4.0.0) of the QuickBooks Tool Hub.
2. Locate the file you downloaded (QuickBooksToolHub.exe).
3. Follow the on-screen steps to install and agree to the terms and conditions.
4. From the tool hub, click Company File Issues.
5. Choose Quick Fix my File.
6. Click OK when it completes and launch your QuickBooks.

For more troubleshooting steps, you can check out these links:

• How to fix Error 6000,-83
• Fix company file and network issues with QuickBooks File Doctor

As always, feel free to visit our QuickBooks Community help website if you need tips and related articles in the future.

Don't hesitate to leave a comment below if you have follow-up questions or concerns. I'm always here to help.