Network errors such as error -6000, -80: "An error occurred when QuickBooks tried to access the company file," can occur when restoring a QuickBooks company file from a backup, updating a company file, or attempting to open a company file.
How to resolve an error caused by a damaged user account.
Steps for resolving error -6190, -83 error, which can happen when more than one computer is set to host the same company file.
Steps to resolve error -6000, -83, "An error occurred when QuickBooks tried to access the company file," or a message about not having sufficient permissions to the specified folder.