QuickBooks Company File Not Found: Troubleshooting Network and File Path Issues
The "Company File Not Found" error in QuickBooks can result from network connectivity issues or a missing file path. Ensure the file is correctly stored on the server and verify network permissions. Check that the company file is not corrupt and that you have proper access rights. A reboot or network reset might also help.
https://ekonty.com/blogs/18166/QB-Error-Code-6123