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I have been using the 2018 edition of QuickBooks Desktop pro for the last 6 months. This morning, when I tried to open up my QuickBooks file, I was denied access and received the QuickBooks Error 6143 message on my system. I have tried restarting my computer to get rid of the error but I still keep receiving the same message. I have a lot of bills that I need to enter but am unable to open the data file. Kindly help me to resolve the QuickBooks error 6143. Thank you.

Close all QuickBooks processes

Log in as the Administrator.

Press Ctrl+Shift+Esc which will display the task manager.

Selecting the Users tab to show processes for all users.

If the error is still not resolved, it could be due to because the folder where the file is saved does not have the right permission.