The QuickBooks Error code 6189, 816 is a run-time error that occurs when attempting to launch QuickBooks Desktop or while opening a company file (.QBW) on a multi-user network.

This error code could have several reasons. These are arranged in the order of:

•           If you try to open a QuickBooks file that is already opened by another user.

•           Using a broken QuickBooks software link or an unfinished QuickBooks installation method.

•           When you open a folder or file for which you don't have read- or write-access rights.

•           Faulty registry entries in Windows can result from incorrect QuickBooks software installation.

•           The QuickBooks application's linked files may be corrupted as a result of a malware or virus assault.

•           The Windows registry may have been harmed by a recent QuickBooks upgrade.

•           You might be using the Single User Mode to access QuickBooks.

•           Using an outdated or out-of-date operating system.

•           This issue could also be caused by the unintentional deletion of crucial system drivers.