QuickBooks is the famous accounting software that works on the data of the company stored in the company file. Opening the company file is one of the most common actions performed by users. The inability to access the same brings the whole working to a halt. QuickBooks error 6189 -816 with an error message “QuickBooks is unable to open this company file.” appears whose reasons and solutions have been listed in this blog thereafter. Follow the complete blog to get QuickBooks error 6189 and 816 resolved. Reasons that trigger QuickBooks Error 6189 and 816 There is a list of reasons that are responsible for the occurrence of Error 6189-186 in QuickBooks Desktop. But, for an effective solution, you must recognize what was the cause in your case. Reasons that trigger Error 6189 -186 in QuickBooks Desktop Application are as follows. The read/write permissions are not vested to you for the company file you are trying to access. The setup file used to install QuickBooks was c