QuickBooks Error 6190 happens when a company file is corrupted and cannot be accessed by users, or when the file is already open on another computer. This mistake causes frustration by interfering with workflow. It can be fixed by using QuickBooks tools to safely repair the company file, stopping numerous sessions, or practicing good file management.  For knowledgeable advice and assistance with QuickBooks, give 1.855.738.2784 a call.