What is QuickBooks Error 6189 816? QuickBooks Error 6189 816 is a runtime error code from series 6000 it happens when you access, create, or open the company file on the multi-user network. Fix it by restarting the server and computer. Then fix the company file with the QuickBooks tool hub. Error Codes: QuickBooks Error … Continue reading How to Fix QuickBooks Error 6189 816?