Take reference from the linked article if you want to resolve QuickBooks error 6189-816 yourself using quick fixes. If you still have any doubts, get in touch with the certified QuickBooks professionals by calling us on our helpline number 1-800-579-9430.
-6000 error series is one of a most critical error series associated with the company file that could appear within the QuickBooks.
When the user tries to open/access/create the company file, it leads to the QuickBooks error code 6189.
It might be possible that some other code may pop up on the system due to the same reason.
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QuickBooks Error 6189 -816 comes when the QuickBooks is not properly installed and users try to open a QuickBooks file which is already in use.
You can fix this Fixing Company File using QuickBooks Tool Hub but if you are not able to fix it then you may seek our experts help at our TFN (844)-932-1139.