<a href="https://intuitquickbookserrorsupport.com/quickbooks-error-code-6073/">QuickBooks error 6073, 9901</a> is reported when you try to open the company file in multi-user mode. This error indicates that somebody is already using the same company file. When this error occurs, you are unable to access the company file and you get an error message on the screen of your system.