Thanks for joining the thread, @racrt.

Allow me to chime in for a moment and help fix the error you're getting when opening your QuickBooks Desktop (QBDT) company file.

To start off, please take note of the following if you're using QBDT in a multi-user environment:

• Your data file is not stored on a network drive.
• You are not using a file sharing service.
• You are not using an encryption software on your computer.

To fix this, please follow the steps below:

1. Restart each computer that has access to your company file.
2. If your data is on a server, restart the server.
3. Once done, re-open your QuickBooks company file.

If the issue persists, you can check out this article and proceed to solution 2 for additional troubleshooting steps: Error -6189, 816 when opening a company file.

That should get you fixed right up. Please let me know how it goes or if you have any follow-up questions so I can get back to you. I'm always here to help you out. Take care always!